diff --git a/sys/libkern/arm64/crc32c_armv8.S b/sys/libkern/arm64/crc32c_armv8.S
index 072dfd6427ba..e5d0ff80d97b 100644
--- a/sys/libkern/arm64/crc32c_armv8.S
+++ b/sys/libkern/arm64/crc32c_armv8.S
@@ -27,6 +27,7 @@
 
 #include <machine/asm.h>
 __FBSDID("$FreeBSD$");
+.arch armv8-a+crc
 
 /*
  * uint32_t