diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index fd242b7408e..0c14d7e3261 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -40,7 +40,7 @@ builtin___build_class__(PyObject *self, PyObject *args, PyObject *kwds)
 {
     PyObject *func, *name, *bases, *mkw, *meta, *winner, *prep, *ns, *cell;
     PyObject *cls = NULL;
-    Py_ssize_t nargs, nbases;
+    Py_ssize_t nargs;
     int isclass;
     _Py_IDENTIFIER(__prepare__);