diff --git a/Objects/object.c b/Objects/object.c
index 1b37a8d..9e25467 100644
--- a/Objects/object.c
+++ b/Objects/object.c
@@ -1666,7 +1666,7 @@
 
 /* Helper for PyObject_Dir without arguments: returns the local scope. */
 static PyObject *
-_dir_locals()
+_dir_locals(void)
 {
 	PyObject *names;
 	PyObject *locals = PyEval_GetLocals();
@@ -2209,4 +2209,3 @@
 #ifdef __cplusplus
 }
 #endif
-