diff --git a/freeze/SIS4.py b/freeze/SIS4.py
index afafa1b..a728a9b 100644
--- a/freeze/SIS4.py
+++ b/freeze/SIS4.py
@@ -19,5 +19,6 @@ def sis_gui():
     sys.exit(app.exec_())
 
 
-freeze_support()
-sis_gui()
+if __name__ == '__main__':
+    freeze_support()
+    sis_gui()