diff -r ddb1cf7b7eb1 Objects/dictobject.c
--- a/Objects/dictobject.c	Thu Sep 08 22:27:39 2016 -0400
+++ b/Objects/dictobject.c	Fri Sep 09 17:09:33 2016 +0800
@@ -675,7 +675,7 @@
                 *hashpos = (freeslot == -1) ? (Py_ssize_t)i : freeslot;
             }
             *value_addr = NULL;
-            return ix;
+            return DKIX_EMPTY;
         }
         if (ix == DKIX_DUMMY) {
             if (freeslot == -1)