diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index f7b316b..8828a2d 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -458,7 +458,7 @@
 		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;
 }