diff --git a/src/sysyc.cpp b/src/sysyc.cpp
index eb774f6..692225d 100644
--- a/src/sysyc.cpp
+++ b/src/sysyc.cpp
@@ -23,7 +23,7 @@ using namespace antlr4;
 
 using namespace sysy;
 
-int DEBUG = 1;
+int DEBUG = 0;
 int DEEPDEBUG = 0;
 
 static string argStopAfter;