diff --git a/tools/building.py b/tools/building.py
index 125da8521e76..7abedd4f27e6 100644
--- a/tools/building.py
+++ b/tools/building.py
@@ -1067,7 +1067,7 @@ def EndBuilding(target, program = None):
     if not GetOption('help') and not GetOption('target'):
         if not os.path.exists(rtconfig.EXEC_PATH):
             print ("Error: the toolchain path (" + rtconfig.EXEC_PATH + ") is not exist, please check 'EXEC_PATH' in path or rtconfig.py.")
-            need_exit = True
+            sys.exit(1)
 
     if need_exit:
         exit(0)