diff --git a/Source/SupportFunctions/arm_f16_to_f64.c b/Source/SupportFunctions/arm_f16_to_f64.c
index d80295d27..d27da5736 100644
--- a/Source/SupportFunctions/arm_f16_to_f64.c
+++ b/Source/SupportFunctions/arm_f16_to_f64.c
@@ -28,6 +28,7 @@
 
 #include "dsp/support_functions_f16.h"
 
+#if defined(ARM_FLOAT16_SUPPORTED)
 
 /**
   @ingroup groupSupport
@@ -80,3 +81,4 @@ void arm_f16_to_f64(
 
 
 
+#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */ 
diff --git a/Source/SupportFunctions/arm_f64_to_f16.c b/Source/SupportFunctions/arm_f64_to_f16.c
index a631b6978..b4622f520 100644
--- a/Source/SupportFunctions/arm_f64_to_f16.c
+++ b/Source/SupportFunctions/arm_f64_to_f16.c
@@ -28,6 +28,8 @@
 
 #include "dsp/support_functions_f16.h"
 
+#if defined(ARM_FLOAT16_SUPPORTED)
+
 /**
   @ingroup groupSupport
  */
@@ -78,3 +80,4 @@ void arm_f64_to_f16(
   @} end of f64_to_x group
  */
 
+#endif /* #if defined(ARM_FLOAT16_SUPPORTED) */