fix tuple.index() error message #5495
diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index d7cb25a..74d392a 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -483,7 +483,7 @@
 		else if (cmp < 0)
 			return NULL;
 	}
-	PyErr_SetString(PyExc_ValueError, "tuple.index(x): x not in list");
+	PyErr_SetString(PyExc_ValueError, "tuple.index(x): x not in tuple");
 	return NULL;
 }