@@ -26,11 +26,11 @@
 of_atomic_int32_add(volatile int32_t *_Nonnull p, int32_t i)
 {
 	return OSAtomicAdd32(i, p);
 }
 
-static OF_INLINE void*
+static OF_INLINE void *_Nullable
 of_atomic_ptr_add(void *volatile _Nullable *_Nonnull p, intptr_t i)
 {
 #ifdef __LP64__
 	return (void*)OSAtomicAdd64(i, (int64_t*)p);
 #else
@@ -48,11 +48,11 @@
 of_atomic_int32_sub(volatile int32_t *_Nonnull p, int32_t i)
 {
 	return OSAtomicAdd32(-i, p);
 }
 
-static OF_INLINE void*
+static OF_INLINE void *_Nullable
 of_atomic_ptr_sub(void *volatile _Nullable *_Nonnull p, intptr_t i)
 {
 #ifdef __LP64__
 	return (void*)OSAtomicAdd64(-i, (int64_t*)p);
 #else