diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h
index c3407fee..47e81ac4 100644
--- a/arch/x86/include/asm/atomic.h
+++ b/arch/x86/include/asm/atomic.h
@@ -88,7 +88,7 @@ inline static int32_t atomic_int32_test_and_set(atomic_int32_t* d, int32_t ret)
 inline static int32_t atomic_int32_add(atomic_int32_t *d, int32_t i)
 {
 	int32_t res = i;
-        asm volatile(LOCK "xaddl %0, %1" : "=r"(i) : "m"(d->counter), "0"(i));
+        asm volatile(LOCK "xaddl %0, %1" : "=r"(i) : "m"(d->counter), "0"(i) : "memory");
 	return res+i;
 }