Add missing typecast.
diff --git a/Modules/pwdmodule.c b/Modules/pwdmodule.c
index a52d45f..08c86d5 100644
--- a/Modules/pwdmodule.c
+++ b/Modules/pwdmodule.c
@@ -149,7 +149,8 @@
{"getpwuid", pwd_getpwuid, METH_OLDARGS, pwd_getpwuid__doc__},
{"getpwnam", pwd_getpwnam, METH_OLDARGS, pwd_getpwnam__doc__},
#ifdef HAVE_GETPWENT
- {"getpwall", pwd_getpwall, METH_NOARGS, pwd_getpwall__doc__},
+ {"getpwall", (PyCFunction)pwd_getpwall,
+ METH_NOARGS, pwd_getpwall__doc__},
#endif
{NULL, NULL} /* sentinel */
};