1 files changed, 1 insertions, 0 deletions
diff --git a/Python/pystate.c b/Python/pystate.c
index 0544b15aad1..0d4c26f92ce 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1142,6 +1142,7 @@ _Py_CheckMainModule(PyObject *module)
         PyObject *msg = PyUnicode_FromString("invalid __main__ module");
         if (msg != NULL) {
             (void)PyErr_SetImportError(msg, &_Py_ID(__main__), NULL);
+            Py_DECREF(msg);
         }
         return -1;
     }