diff --git a/README.md b/README.md
index f713acbc..c0226183 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@
 Other compiler may work, but are not tested within the continuous integration. In general, the latest minor release of each
 listed major compiler version is supported.
 
-* GCC 10, 11, 12
+* GCC 10, 11, 12, 13
 * clang 11, 12, 13, 14
 
 Tests are run with both C++20 and C++23.
diff --git a/include/sdsl/bits.hpp b/include/sdsl/bits.hpp
index 8fa7d4c6..46fb5db7 100644
--- a/include/sdsl/bits.hpp
+++ b/include/sdsl/bits.hpp
@@ -8,7 +8,17 @@
 #ifndef INCLUDED_SDSL_BITS
 #define INCLUDED_SDSL_BITS
 
+// GCC definitions
+#if defined(__x86_64__)
 #include <immintrin.h> // IWYU pragma: keep
+#endif
+#if defined(__aarch64__) || defined(_M_ARM64)
+#include <arm_neon.h>
+#endif
+#if defined(__powerpc__) || defined(__powerpc64__)
+#include <altivec.h>
+#endif
+
 #include <stddef.h>
 #include <stdint.h> // for uint64_t uint32_t declaration
 #ifdef __SSE4_2__