diff --git a/lib/auxlib.h b/lib/auxlib.h
index 04a09adb3..c98ad099a 100644
--- a/lib/auxlib.h
+++ b/lib/auxlib.h
@@ -592,6 +592,7 @@ INLINE double atomic64_div(const atomic64 *n, const atomic64 *d) {
 
 #define atomic_get_na(x) __atomic_load_n(x, __ATOMIC_RELAXED)
 #define atomic_set_na(x,y) __atomic_store_n(x, y, __ATOMIC_RELAXED)
+#define atomic_inc_na(x) __atomic_fetch_add(x, 1, __ATOMIC_RELAXED);
 
 
 /*** ATOMIC BITFIELD OPERATIONS ***/