diff --git a/patch-ids.c b/patch-ids.c
index af17828..12aa6d4 100644
--- a/patch-ids.c
+++ b/patch-ids.c
@@ -101,8 +101,7 @@ struct patch_id *has_commit_patch_id(struct commit *commit,
 	if (init_patch_id_entry(&patch, commit, ids))
 		return NULL;
 
-	return hashmap_get_entry(&ids->patches, &patch, NULL,
-					struct patch_id, ent);
+	return hashmap_get_entry(&ids->patches, &patch, ent, NULL);
 }
 
 struct patch_id *add_commit_patch_id(struct commit *commit,