diff --git a/Objects/tupleobject.c b/Objects/tupleobject.c
index 451e794..f89fa36 100644
--- a/Objects/tupleobject.c
+++ b/Objects/tupleobject.c
@@ -362,7 +362,7 @@
 	PyTupleObject *np;
 	if (!PyTuple_Check(bb)) {
 		PyErr_Format(PyExc_TypeError,
-       		     "can only append tuple (not \"%.200s\") to tuple",
+       		     "can only concatenate tuple (not \"%.200s\") to tuple",
 			     bb->ob_type->tp_name);
 		return NULL;
 	}