diff --git a/pym/cl_base.py b/pym/cl_base.py
index 3554577..aaff864 100644
--- a/pym/cl_base.py
+++ b/pym/cl_base.py
@@ -368,7 +368,7 @@ class opt:
             opts, args = getopt.getopt(self.sysArgv,self.shortOpt,self.longOpt)
         except getopt.GetoptError:
             self.handlerErrOpt()
-            sys.exit()
+            sys.exit(1)
         for option, value in opts:
             if len(option) == 2:
                 option = option[1:]