diff --git a/include/lib/libc/arm_acle.h b/include/lib/libc/arm_acle.h
index 953933f..eb08552 100644
--- a/include/lib/libc/arm_acle.h
+++ b/include/lib/libc/arm_acle.h
@@ -14,8 +14,10 @@
 #define ARM_ACLE_H
 
 #if !defined(__aarch64__) || defined(__clang__)
+#	define __crc32b __builtin_arm_crc32b
 #	define __crc32w __builtin_arm_crc32w
 #else
+#	define __crc32b __builtin_aarch64_crc32b
 #	define __crc32w __builtin_aarch64_crc32w
 #endif