1 files changed, 2 insertions, 1 deletions
diff --git a/Python/ceval.c b/Python/ceval.c
index 6e4911ae92..2d4b16a39a 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -3464,7 +3464,8 @@ unpack_iterable(PyObject *v, int argcnt, int argcntafter, PyObject **sp)
             return 1;
         }
         Py_DECREF(w);
-        PyErr_SetString(PyExc_ValueError, "too many values to unpack");
+        PyErr_Format(PyExc_ValueError, "too many values to unpack "
+                     "(expected %d)", argcnt);
         goto Error;
     }