1 files changed, 6 insertions, 1 deletions

diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index aaf367e08..96a3c60b9 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -7,7 +7,7 @@ use crate::{
     DefLoc, DefId, MacroCallLoc, MacroCallId, Name, HirFileId,
     SourceFileItems, SourceItemId,
     query_definitions,
-    FnScopes,
+    FnSignature, FnScopes,
     macros::MacroExpansion,
     module::{ModuleId, ModuleTree, ModuleSource,
     nameres::{ItemMap, InputModuleItems}},
@@ -103,6 +103,11 @@ pub trait HirDatabase: SyntaxDatabase
         type BodySyntaxMappingQuery;
         use fn crate::expr::body_syntax_mapping;
     }
+
+    fn fn_signature(def_id: DefId) -> Arc<FnSignature> {
+        type FnSignatureQuery;
+        use fn crate::function::fn_signature;
+    }
 }
 
 }