1 files changed, 1 insertions, 1 deletions

diff --git a/crates/ra_hir_def/src/nameres.rs b/crates/ra_hir_def/src/nameres.rs
index 5a9de3d3e..3d9b55a73 100644
--- a/crates/ra_hir_def/src/nameres.rs
+++ b/crates/ra_hir_def/src/nameres.rs
@@ -239,7 +239,7 @@ impl CrateDefMap {
             entries.sort_by_key(|(name, _)| name.clone());
 
             for (name, def) in entries {
-                format_to!(buf, "{}:", name);
+                format_to!(buf, "{}:", name.map_or("_".to_string(), |name| name.to_string()));
 
                 if def.types.is_some() {
                     buf.push_str(" t");