diff --git a/lib/solaar/gtk.py b/lib/solaar/gtk.py
index fa1e4c41..7c98ed61 100755
--- a/lib/solaar/gtk.py
+++ b/lib/solaar/gtk.py
@@ -156,6 +156,8 @@ def main():
     if not args:
         return
     if args.action:
+        # explicit close before return
+        temp.close()
         # if any argument, run comandline and exit
         return cli.run(args.action, args.hidraw_path)