diff --git a/Python/marshal.c b/Python/marshal.c
index 2049c9b..1af49eb 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -134,7 +134,7 @@
 			extern object *getdict2key();
 			key = getdict2key(v, (int)i);
 			if (key != NULL) {
-				val = dictlookup(v, getstringvalue(key));
+				val = dict2lookup(v, key); /* Can't be NULL */
 				wr_object(key, fp);
 				wr_object(val, fp);
 			}