diff --git a/include/common.h b/include/common.h
index bee2fb7..a873fa9 100644
--- a/include/common.h
+++ b/include/common.h
@@ -110,7 +110,7 @@
 #endif	/* DEBUG */
 
 #define BUG() do { \
-        printf("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
+	printf("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \
 	panic("BUG!"); \
 } while (0)
 #define BUG_ON(condition) do { if (unlikely((condition)!=0)) BUG(); } while(0)