diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 4d960b8..871eaa3 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1121,7 +1121,7 @@
         return NULL;
     if (!PyIter_Check(it)) {
         PyErr_Format(PyExc_TypeError,
-            "%.200s object is not an iterator",
+            "'%.200s' object is not an iterator",
             it->ob_type->tp_name);
         return NULL;
     }