diff --git a/Modules/_tkinter.c b/Modules/_tkinter.c
index 6d096a0..bf7501e 100644
--- a/Modules/_tkinter.c
+++ b/Modules/_tkinter.c
@@ -1202,7 +1202,7 @@
 		PyObject *s = PyString_FromString(argv[i + 1]);
 		if (!s || PyTuple_SetItem(arg, i, s)) {
 			Py_DECREF(arg);
-			PythonCmd_Error(interp);
+			return PythonCmd_Error(interp);
 		}
 	}
 	res = PyEval_CallObject(func, arg);