@@ -44,11 +44,11 @@
 	);
 
 	return i;
 }
 
-static OF_INLINE void*
+static OF_INLINE void *_Nullable
 of_atomic_ptr_add(void *volatile _Nullable *_Nonnull p, intptr_t i)
 {
 	__asm__ __volatile__ (
 	    "0:\n\t"
 	    "lwarx	%0, 0, %2\n\t"
@@ -92,11 +92,11 @@
 	);
 
 	return i;
 }
 
-static OF_INLINE void*
+static OF_INLINE void *_Nullable
 of_atomic_ptr_sub(void *volatile _Nullable *_Nonnull p, intptr_t i)
 {
 	__asm__ __volatile__ (
 	    "0:\n\t"
 	    "lwarx	%0, 0, %2\n\t"