diff --git a/builtin/commit.c b/builtin/commit.c
index 6b693c1..c9cbb81 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -205,7 +205,7 @@
 	}
 
 	for (i = 0; i < active_nr; i++) {
-		struct cache_entry *ce = active_cache[i];
+		const struct cache_entry *ce = active_cache[i];
 		struct string_list_item *item;
 
 		if (ce->ce_flags & CE_UPDATE)