1 files changed, 6 insertions, 1 deletions
diff --git a/Doc/includes/custom4.c b/Doc/includes/custom4.c
index b0b2906..584992f 100644
--- a/Doc/includes/custom4.c
+++ b/Doc/includes/custom4.c
@@ -193,6 +193,11 @@ PyInit_custom4(void)
         return NULL;
 
     Py_INCREF(&CustomType);
-    PyModule_AddObject(m, "Custom", (PyObject *) &CustomType);
+    if (PyModule_AddObject(m, "Custom", (PyObject *) &CustomType) < 0) {
+        Py_DECREF(&CustomType);
+        Py_DECREF(m);
+        return NULL;
+    }
+
     return m;
 }