diff --git a/Modules/operator.c b/Modules/operator.c
index 375592c..345c32e 100644
--- a/Modules/operator.c
+++ b/Modules/operator.c
@@ -511,6 +511,8 @@
     PyObject *obj, *result;
     Py_ssize_t i, nitems=ig->nitems;
 
+    if (!_PyArg_NoKeywords("itemgetter", kw))
+        return NULL;
     if (!PyArg_UnpackTuple(args, "itemgetter", 1, 1, &obj))
         return NULL;
     if (nitems == 1)
@@ -691,6 +693,8 @@
     PyObject *obj, *result;
     Py_ssize_t i, nattrs=ag->nattrs;
 
+    if (!_PyArg_NoKeywords("attrgetter", kw))
+        return NULL;
     if (!PyArg_UnpackTuple(args, "attrgetter", 1, 1, &obj))
         return NULL;
     if (ag->nattrs == 1)
@@ -838,6 +842,8 @@
 {
     PyObject *method, *obj, *result;
 
+    if (!_PyArg_NoKeywords("methodcaller", kw))
+        return NULL;
     if (!PyArg_UnpackTuple(args, "methodcaller", 1, 1, &obj))
         return NULL;
     method = PyObject_GetAttr(obj, mc->name);