diff --git a/Lib/test/test_threaded_import.py b/Lib/test/test_threaded_import.py
index 8bdae4249df..dc27d4e66a7 100644
--- a/Lib/test/test_threaded_import.py
+++ b/Lib/test/test_threaded_import.py
@@ -51,6 +51,7 @@ def test_main():        # magic name!  see above
         done.acquire()
         if verbose:
             print "OK."
+    done.release()
 
 if __name__ == "__main__":
     test_main()