diff --git a/YASI_12/common.h b/YASI_12/common.h
index 903c7e4..4d31bef 100644
--- a/YASI_12/common.h
+++ b/YASI_12/common.h
@@ -24,6 +24,7 @@ namespace yasi{
 #define MAKE_UNIQUE2(x,y)	MAKE_UNIQUE( CONCAT(x,y) )
 #define MAKE_UNIQUE3(x,y, z)	MAKE_UNIQUE2( CONCAT(x,y), z )
 
+#define FREE_SAFE(x) {if( (x) != 0 ) free(x); (x) = 0; }
 #define DELETE_SAFE(x) {if( (x) != 0 ) delete (x); (x) = 0; }
 #define FREE_SAFE(x) {if( (x) != 0 ) free(x); (x) = 0; }
 #define DELETE_ARR_SAFE(x) {if( (x) != 0 ) delete[] (x); (x) = 0; }