diff --git a/Objects/abstract.c b/Objects/abstract.c
index 8d07cfa..b27d0c7 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -46,7 +46,7 @@
   return 0;
 }
 
-PyObject *
+static PyObject *
 Py_ReturnNullError()
 {
   if(! PyErr_Occurred())