diff --git a/src/aegis128x2/aegis128x2.c b/src/aegis128x2/aegis128x2.c
index dda159d..bd436f5 100644
--- a/src/aegis128x2/aegis128x2.c
+++ b/src/aegis128x2/aegis128x2.c
@@ -187,10 +187,12 @@ aegis128x2_pick_best_implementation(void)
 #endif
 
 #if defined(__x86_64__) || defined(_M_AMD64) || defined(__i386__) || defined(_M_IX86)
+#    ifdef HAVE_VAESINTRIN_H
     if (aegis_runtime_has_vaes() && aegis_runtime_has_avx2()) {
         implementation = &aegis128x2_avx2_implementation;
         return 0;
     }
+#    endif
     if (aegis_runtime_has_aesni() && aegis_runtime_has_avx()) {
         implementation = &aegis128x2_aesni_implementation;
         return 0;
diff --git a/src/aegis128x2/aegis128x2_avx2.c b/src/aegis128x2/aegis128x2_avx2.c
index 44af2f6..88bb4b3 100644
--- a/src/aegis128x2/aegis128x2_avx2.c
+++ b/src/aegis128x2/aegis128x2_avx2.c
@@ -10,26 +10,28 @@
 #    include "aegis128x2.h"
 #    include "aegis128x2_avx2.h"
 
-#    ifdef __clang__
-#        pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
-#    elif defined(__GNUC__)
-#        pragma GCC target("vaes,avx2")
-#    endif
+#    ifdef HAVE_VAESINTRIN_H
+
+#        ifdef __clang__
+#            pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
+#        elif defined(__GNUC__)
+#            pragma GCC target("vaes,avx2")
+#        endif
 
-#    include <immintrin.h>
+#        include <immintrin.h>
 
-#    define AES_BLOCK_LENGTH 32
+#        define AES_BLOCK_LENGTH 32
 
 typedef __m256i aes_block_t;
 
-#    define AES_BLOCK_XOR(A, B) _mm256_xor_si256((A), (B))
-#    define AES_BLOCK_AND(A, B) _mm256_and_si256((A), (B))
-#    define AES_BLOCK_LOAD128_BROADCAST(A) \
-        _mm256_broadcastsi128_si256(_mm_loadu_si128((const void *) (A)))
-#    define AES_BLOCK_LOAD(A)         _mm256_loadu_si256((const aes_block_t *) (const void *) (A))
-#    define AES_BLOCK_LOAD_64x2(A, B) _mm256_broadcastsi128_si256(_mm_set_epi64x((A), (B)))
-#    define AES_BLOCK_STORE(A, B)     _mm256_storeu_si256((aes_block_t *) (void *) (A), (B))
-#    define AES_ENC(A, B)             _mm256_aesenc_epi128((A), (B))
+#        define AES_BLOCK_XOR(A, B) _mm256_xor_si256((A), (B))
+#        define AES_BLOCK_AND(A, B) _mm256_and_si256((A), (B))
+#        define AES_BLOCK_LOAD128_BROADCAST(A) \
+            _mm256_broadcastsi128_si256(_mm_loadu_si128((const void *) (A)))
+#        define AES_BLOCK_LOAD(A)         _mm256_loadu_si256((const aes_block_t *) (const void *) (A))
+#        define AES_BLOCK_LOAD_64x2(A, B) _mm256_broadcastsi128_si256(_mm_set_epi64x((A), (B)))
+#        define AES_BLOCK_STORE(A, B)     _mm256_storeu_si256((aes_block_t *) (void *) (A), (B))
+#        define AES_ENC(A, B)             _mm256_aesenc_epi128((A), (B))
 
 static inline void
 aegis128x2_update(aes_block_t *const state, const aes_block_t d1, const aes_block_t d2)
@@ -50,7 +52,7 @@ aegis128x2_update(aes_block_t *const state, const aes_block_t d1, const aes_bloc
     state[4] = AES_BLOCK_XOR(state[4], d2);
 }
 
-#    include "aegis128x2_common.h"
+#        include "aegis128x2_common.h"
 
 struct aegis128x2_implementation aegis128x2_avx2_implementation = {
     .encrypt_detached              = encrypt_detached,
@@ -66,8 +68,10 @@ struct aegis128x2_implementation aegis128x2_avx2_implementation = {
     .state_decrypt_detached_final  = state_decrypt_detached_final,
 };
 
-#    ifdef __clang__
-#        pragma clang attribute pop
+#         ifdef __clang__
+#             pragma clang attribute pop
+#         endif
+
 #    endif
 
 #endif
diff --git a/src/aegis128x2/aegis128x2_avx2.h b/src/aegis128x2/aegis128x2_avx2.h
index cdc18b8..6567b92 100644
--- a/src/aegis128x2/aegis128x2_avx2.h
+++ b/src/aegis128x2/aegis128x2_avx2.h
@@ -4,6 +4,8 @@
 #include "../common/common.h"
 #include "implementations.h"
 
+#ifdef HAVE_VAESINTRIN_H
 extern struct aegis128x2_implementation aegis128x2_avx2_implementation;
+#endif
 
 #endif
\ No newline at end of file
diff --git a/src/aegis128x4/aegis128x4.c b/src/aegis128x4/aegis128x4.c
index c68c356..da30d14 100644
--- a/src/aegis128x4/aegis128x4.c
+++ b/src/aegis128x4/aegis128x4.c
@@ -193,11 +193,11 @@ aegis128x4_pick_best_implementation(void)
         implementation = &aegis128x4_avx512_implementation;
         return 0;
     }
-#    endif
     if (aegis_runtime_has_vaes() && aegis_runtime_has_avx2()) {
         implementation = &aegis128x4_avx2_implementation;
         return 0;
     }
+#    endif
     if (aegis_runtime_has_aesni() && aegis_runtime_has_avx()) {
         implementation = &aegis128x4_aesni_implementation;
         return 0;
diff --git a/src/aegis128x4/aegis128x4_avx2.c b/src/aegis128x4/aegis128x4_avx2.c
index f704a4b..aa54fba 100644
--- a/src/aegis128x4/aegis128x4_avx2.c
+++ b/src/aegis128x4/aegis128x4_avx2.c
@@ -10,15 +10,17 @@
 #    include "aegis128x4.h"
 #    include "aegis128x4_avx2.h"
 
-#    ifdef __clang__
-#        pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
-#    elif defined(__GNUC__)
-#        pragma GCC target("vaes,avx2")
-#    endif
+#    ifdef HAVE_VAESINTRIN_H
+
+#        ifdef __clang__
+#            pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
+#        elif defined(__GNUC__)
+#            pragma GCC target("vaes,avx2")
+#        endif
 
-#    include <immintrin.h>
+#        include <immintrin.h>
 
-#    define AES_BLOCK_LENGTH 64
+#        define AES_BLOCK_LENGTH 64
 
 typedef struct {
     __m256i b0;
@@ -83,7 +85,7 @@ aegis128x4_update(aes_block_t *const state, const aes_block_t d1, const aes_bloc
     state[4] = AES_BLOCK_XOR(state[4], d2);
 }
 
-#    include "aegis128x4_common.h"
+#        include "aegis128x4_common.h"
 
 struct aegis128x4_implementation aegis128x4_avx2_implementation = {
     .encrypt_detached              = encrypt_detached,
@@ -99,8 +101,10 @@ struct aegis128x4_implementation aegis128x4_avx2_implementation = {
     .state_decrypt_detached_final  = state_decrypt_detached_final,
 };
 
-#    ifdef __clang__
-#        pragma clang attribute pop
+#        ifdef __clang__
+#            pragma clang attribute pop
+#        endif
+
 #    endif
 
-#endif
+#endif
\ No newline at end of file
diff --git a/src/aegis128x4/aegis128x4_avx2.h b/src/aegis128x4/aegis128x4_avx2.h
index bd99052..62ca093 100644
--- a/src/aegis128x4/aegis128x4_avx2.h
+++ b/src/aegis128x4/aegis128x4_avx2.h
@@ -4,6 +4,8 @@
 #include "../common/common.h"
 #include "implementations.h"
 
+#ifdef HAVE_VAESINTRIN_H
 extern struct aegis128x4_implementation aegis128x4_avx2_implementation;
+#endif
 
 #endif
\ No newline at end of file
diff --git a/src/aegis256x2/aegis256x2.c b/src/aegis256x2/aegis256x2.c
index 787b7e9..98b6960 100644
--- a/src/aegis256x2/aegis256x2.c
+++ b/src/aegis256x2/aegis256x2.c
@@ -187,10 +187,12 @@ aegis256x2_pick_best_implementation(void)
 #endif
 
 #if defined(__x86_64__) || defined(_M_AMD64) || defined(__i386__) || defined(_M_IX86)
+#    ifdef HAVE_VAESINTRIN_H
     if (aegis_runtime_has_vaes() && aegis_runtime_has_avx2()) {
         implementation = &aegis256x2_avx2_implementation;
         return 0;
     }
+#    endif
     if (aegis_runtime_has_aesni() && aegis_runtime_has_avx()) {
         implementation = &aegis256x2_aesni_implementation;
         return 0;
diff --git a/src/aegis256x2/aegis256x2_avx2.c b/src/aegis256x2/aegis256x2_avx2.c
index ed8aa13..c17ce5c 100644
--- a/src/aegis256x2/aegis256x2_avx2.c
+++ b/src/aegis256x2/aegis256x2_avx2.c
@@ -10,26 +10,28 @@
 #    include "aegis256x2.h"
 #    include "aegis256x2_avx2.h"
 
-#    ifdef __clang__
-#        pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
-#    elif defined(__GNUC__)
-#        pragma GCC target("vaes,avx2")
-#    endif
+#    ifdef HAVE_VAESINTRIN_H
+
+#        ifdef __clang__
+#            pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
+#        elif defined(__GNUC__)
+#            pragma GCC target("vaes,avx2")
+#        endif
 
-#    include <immintrin.h>
+#        include <immintrin.h>
 
-#    define AES_BLOCK_LENGTH 32
+#        define AES_BLOCK_LENGTH 32
 
 typedef __m256i aes_block_t;
 
-#    define AES_BLOCK_XOR(A, B) _mm256_xor_si256((A), (B))
-#    define AES_BLOCK_AND(A, B) _mm256_and_si256((A), (B))
-#    define AES_BLOCK_LOAD128_BROADCAST(A) \
-        _mm256_broadcastsi128_si256(_mm_loadu_si128((const void *) (A)))
-#    define AES_BLOCK_LOAD(A)         _mm256_loadu_si256((const aes_block_t *) (const void *) (A))
-#    define AES_BLOCK_LOAD_64x2(A, B) _mm256_broadcastsi128_si256(_mm_set_epi64x((A), (B)))
-#    define AES_BLOCK_STORE(A, B)     _mm256_storeu_si256((aes_block_t *) (void *) (A), (B))
-#    define AES_ENC(A, B)             _mm256_aesenc_epi128((A), (B))
+#        define AES_BLOCK_XOR(A, B) _mm256_xor_si256((A), (B))
+#        define AES_BLOCK_AND(A, B) _mm256_and_si256((A), (B))
+#        define AES_BLOCK_LOAD128_BROADCAST(A) \
+            _mm256_broadcastsi128_si256(_mm_loadu_si128((const void *) (A)))
+#        define AES_BLOCK_LOAD(A)         _mm256_loadu_si256((const aes_block_t *) (const void *) (A))
+#        define AES_BLOCK_LOAD_64x2(A, B) _mm256_broadcastsi128_si256(_mm_set_epi64x((A), (B)))
+#        define AES_BLOCK_STORE(A, B)     _mm256_storeu_si256((aes_block_t *) (void *) (A), (B))
+#        define AES_ENC(A, B)             _mm256_aesenc_epi128((A), (B))
 
 static inline void
 aegis256x2_update(aes_block_t *const state, const aes_block_t d)
@@ -45,7 +47,7 @@ aegis256x2_update(aes_block_t *const state, const aes_block_t d)
     state[0] = AES_BLOCK_XOR(AES_ENC(tmp, state[0]), d);
 }
 
-#    include "aegis256x2_common.h"
+#        include "aegis256x2_common.h"
 
 struct aegis256x2_implementation aegis256x2_avx2_implementation = {
     .encrypt_detached              = encrypt_detached,
@@ -61,8 +63,10 @@ struct aegis256x2_implementation aegis256x2_avx2_implementation = {
     .state_decrypt_detached_final  = state_decrypt_detached_final,
 };
 
-#    ifdef __clang__
-#        pragma clang attribute pop
+#        ifdef __clang__
+#            pragma clang attribute pop
+#        endif
+
 #    endif
 
-#endif
+#endif
\ No newline at end of file
diff --git a/src/aegis256x2/aegis256x2_avx2.h b/src/aegis256x2/aegis256x2_avx2.h
index 223095a..ec78360 100644
--- a/src/aegis256x2/aegis256x2_avx2.h
+++ b/src/aegis256x2/aegis256x2_avx2.h
@@ -4,6 +4,8 @@
 #include "../common/common.h"
 #include "implementations.h"
 
+#ifdef HAVE_VAESINTRIN_H
 extern struct aegis256x2_implementation aegis256x2_avx2_implementation;
+#endif
 
 #endif
\ No newline at end of file
diff --git a/src/aegis256x4/aegis256x4.c b/src/aegis256x4/aegis256x4.c
index f11f9c4..2c8dea7 100644
--- a/src/aegis256x4/aegis256x4.c
+++ b/src/aegis256x4/aegis256x4.c
@@ -193,11 +193,11 @@ aegis256x4_pick_best_implementation(void)
         implementation = &aegis256x4_avx512_implementation;
         return 0;
     }
-#    endif
     if (aegis_runtime_has_vaes() && aegis_runtime_has_avx2()) {
         implementation = &aegis256x4_avx2_implementation;
         return 0;
     }
+#    endif
     if (aegis_runtime_has_aesni() && aegis_runtime_has_avx()) {
         implementation = &aegis256x4_aesni_implementation;
         return 0;
diff --git a/src/aegis256x4/aegis256x4_avx2.c b/src/aegis256x4/aegis256x4_avx2.c
index 404fcda..a1bd5ba 100644
--- a/src/aegis256x4/aegis256x4_avx2.c
+++ b/src/aegis256x4/aegis256x4_avx2.c
@@ -10,15 +10,17 @@
 #    include "aegis256x4.h"
 #    include "aegis256x4_avx2.h"
 
-#    ifdef __clang__
-#        pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
-#    elif defined(__GNUC__)
-#        pragma GCC target("vaes,avx2")
-#    endif
+#    ifdef HAVE_VAESINTRIN_H
+
+#        ifdef __clang__
+#            pragma clang attribute push(__attribute__((target("vaes,avx2"))), apply_to = function)
+#        elif defined(__GNUC__)
+#            pragma GCC target("vaes,avx2")
+#        endif
 
-#    include <immintrin.h>
+#        include <immintrin.h>
 
-#    define AES_BLOCK_LENGTH 64
+#        define AES_BLOCK_LENGTH 64
 
 typedef struct {
     __m256i b0;
@@ -78,7 +80,7 @@ aegis256x4_update(aes_block_t *const state, const aes_block_t d)
     state[0] = AES_BLOCK_XOR(AES_ENC(tmp, state[0]), d);
 }
 
-#    include "aegis256x4_common.h"
+#        include "aegis256x4_common.h"
 
 struct aegis256x4_implementation aegis256x4_avx2_implementation = {
     .encrypt_detached              = encrypt_detached,
@@ -94,8 +96,10 @@ struct aegis256x4_implementation aegis256x4_avx2_implementation = {
     .state_decrypt_detached_final  = state_decrypt_detached_final,
 };
 
-#    ifdef __clang__
-#        pragma clang attribute pop
+#        ifdef __clang__
+#            pragma clang attribute pop
+#        endif
+
 #    endif
 
 #endif
\ No newline at end of file
diff --git a/src/aegis256x4/aegis256x4_avx2.h b/src/aegis256x4/aegis256x4_avx2.h
index 31a16b8..e46700c 100644
--- a/src/aegis256x4/aegis256x4_avx2.h
+++ b/src/aegis256x4/aegis256x4_avx2.h
@@ -4,6 +4,8 @@
 #include "../common/common.h"
 #include "implementations.h"
 
+#ifdef HAVE_VAESINTRIN_H
 extern struct aegis256x4_implementation aegis256x4_avx2_implementation;
+#endif
 
 #endif
\ No newline at end of file