diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 9dc0ebd1c6a..6740da108ac 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -6940,7 +6940,7 @@ object_getstate_default(PyObject *obj, int required)
                iterate over it */
             if (slotnames_size != PyList_GET_SIZE(slotnames)) {
                 PyErr_Format(PyExc_RuntimeError,
-                             "__slotsname__ changed size during iteration");
+                             "__slotnames__ changed size during iteration");
                 goto error;
             }