1 files changed, 1 insertions, 1 deletions

diff --git a/crates/ra_hir/src/mock.rs b/crates/ra_hir/src/mock.rs
index 77a44a275..972f0ece5 100644
--- a/crates/ra_hir/src/mock.rs
+++ b/crates/ra_hir/src/mock.rs
@@ -157,7 +157,7 @@ impl MockDatabase {
         self.set_file_text(file_id, text);
         self.set_file_relative_path(file_id, rel_path.clone());
         self.set_file_source_root(file_id, source_root_id);
-        source_root.files.insert(rel_path, file_id);
+        source_root.insert_file(rel_path, file_id);
 
         if is_crate_root {
             let mut crate_graph = CrateGraph::default();