diff --git a/include/ucore/utils.h b/include/ucore/utils.h
index 0720b46..cc1b0cf 100644
--- a/include/ucore/utils.h
+++ b/include/ucore/utils.h
@@ -9,9 +9,7 @@
 //Gnerate a compiler error if the compile time
 //constant expression fails
 #define UC_STATIC_ASSERT(expr) \
-    do { \
-        enum { assert_static__ = 1/(expr) }; \
-    } while (0)
+        enum { assert_static__ = 1/(expr) };
 
 #ifdef DEBUG
     #define TRACEF(fmt, ...)\