diff --git a/Python/getargs.c b/Python/getargs.c
index 9f72fa4ebf3..18c8e918840 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -1742,6 +1742,7 @@ PyArg_UnpackTuple(PyObject *args, const char *name, Py_ssize_t min, Py_ssize_t m
     assert(min >= 0);
     assert(min <= max);
     if (!PyTuple_Check(args)) {
+        va_end(vargs);
         PyErr_SetString(PyExc_SystemError,
             "PyArg_UnpackTuple() argument list is not a tuple");
         return 0;