diff --git a/include/gcc/x86_64/ck_pr.h b/include/gcc/x86_64/ck_pr.h
index df52117..9e952fc 100644
--- a/include/gcc/x86_64/ck_pr.h
+++ b/include/gcc/x86_64/ck_pr.h
@@ -76,6 +76,7 @@ ck_pr_stall(void)
 		__asm__ __volatile__(I ::: "memory");	\
 	}
 
+CK_PR_FENCE(atomic, "sfence")
 CK_PR_FENCE(atomic_store, "sfence")
 CK_PR_FENCE(atomic_load, "mfence")
 CK_PR_FENCE(store_atomic, "sfence")