diff --git a/builtin/fsck.c b/builtin/fsck.c
index 64614b43b2..8813d9b5bb 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -798,7 +798,7 @@ static int fsck_resolve_undo(struct index_state *istate,
 }
 
 static void fsck_index(struct index_state *istate, const char *index_path,
-		       int is_main_index)
+		       int is_current_worktree)
 {
 	unsigned int i;
 
@@ -820,7 +820,7 @@ static void fsck_index(struct index_state *istate, const char *index_path,
 		obj->flags |= USED;
 		fsck_put_object_name(&fsck_walk_options, &obj->oid,
 				     "%s:%s",
-				     is_main_index ? "" : index_path,
+				     is_current_worktree ? "" : index_path,
 				     istate->cache[i]->name);
 		mark_object_reachable(obj);
 	}
diff --git a/t/t1450-fsck.sh b/t/t1450-fsck.sh
index 82c92de7ca..849f577cf6 100755
--- a/t/t1450-fsck.sh
+++ b/t/t1450-fsck.sh
@@ -1039,9 +1039,9 @@ test_expect_success 'fsck detects problems in worktree index' '
 	test_cmp expect actual
 '
 
-test_expect_success 'fsck reports problems in main index without filename' '
+test_expect_success 'fsck reports problems in current worktree index without filename' '
 	test_when_finished "rm -f .git/index && git read-tree HEAD" &&
-	echo "this object will be removed to break the main index" >file &&
+	echo "this object will be removed to break current worktree index" >file &&
 	git add file &&
 	blob=$(git rev-parse :file) &&
 	remove_object $blob &&