diff --git a/include/ucore/atomic.h b/include/ucore/atomic.h
index 5311352..a3b4a67 100644
--- a/include/ucore/atomic.h
+++ b/include/ucore/atomic.h
@@ -30,7 +30,7 @@
  * Atomically increment *ptr
  * @return *ptr before the increment
  */
-#define UC_ATOMIC_INC(ptr) UC_ATOMIC_SUB((ptr), 1)
+#define UC_ATOMIC_INC(ptr) UC_ATOMIC_ADD((ptr), 1)
 
 
 /**