diff --git a/split-index.c b/split-index.c
index 4d6e52d46f7..8e52e891c3b 100644
--- a/split-index.c
+++ b/split-index.c
@@ -207,7 +207,8 @@ static int compare_ce_content(struct cache_entry *a, struct cache_entry *b)
 	b->ce_flags &= ondisk_flags;
 	ret = memcmp(&a->ce_stat_data, &b->ce_stat_data,
 		     offsetof(struct cache_entry, name) -
-		     offsetof(struct cache_entry, ce_stat_data));
+		     offsetof(struct cache_entry, oid)) ||
+		!oideq(&a->oid, &b->oid);
 	a->ce_flags = ce_flags;
 	b->ce_flags = base_flags;