diff --git a/sys/crypto/sha2/sha256c.c b/sys/crypto/sha2/sha256c.c
index 63805c97a4b..57ae9e7a6ab 100644
--- a/sys/crypto/sha2/sha256c.c
+++ b/sys/crypto/sha2/sha256c.c
@@ -138,7 +138,11 @@ static const uint32_t K[64] = {
  * the 512-bit input block to produce a new state.
  */
 static void
+#if defined(ARM64_SHA2)
 SHA256_Transform_c(uint32_t * state, const unsigned char block[64])
+#else
+SHA256_Transform(uint32_t * state, const unsigned char block[64])
+#endif
 {
 	uint32_t W[64];
 	uint32_t S[8];
@@ -213,12 +217,6 @@ DEFINE_UIFUNC(static, void, SHA256_Transform,
 
 	return (SHA256_Transform_c);
 }
-#else
-static void
-SHA256_Transform(uint32_t * state, const unsigned char block[64])
-{
-	SHA256_Transform_c(state, block);
-}
 #endif
 
 static unsigned char PAD[64] = {