1 files changed, 4 insertions, 1 deletions

diff --git a/crates/ra_hir/src/db.rs b/crates/ra_hir/src/db.rs
index 8e827d4f5..bda02d3cc 100644
--- a/crates/ra_hir/src/db.rs
+++ b/crates/ra_hir/src/db.rs
@@ -11,7 +11,7 @@ use crate::{
     DefWithBody, Trait,
     ids,
     nameres::{Namespace, ImportSourceMap, RawItems, CrateDefMap},
-    ty::{InferenceResult, Ty, method_resolution::CrateImplBlocks, TypableDef, CallableDef, FnSig, TypeCtor, GenericPredicate},
+    ty::{InferenceResult, Ty, method_resolution::CrateImplBlocks, TypableDef, CallableDef, FnSig, TypeCtor, GenericPredicate, Substs},
     adt::{StructData, EnumData},
     impl_block::{ModuleImplBlocks, ImplSourceMap, ImplBlock},
     generics::{GenericParams, GenericDef},
@@ -141,6 +141,9 @@ pub trait HirDatabase: DefDatabase {
     #[salsa::invoke(crate::ty::generic_predicates)]
     fn generic_predicates(&self, def: GenericDef) -> Arc<[GenericPredicate]>;
 
+    #[salsa::invoke(crate::ty::generic_defaults)]
+    fn generic_defaults(&self, def: GenericDef) -> Substs;
+
     #[salsa::invoke(crate::expr::body_with_source_map_query)]
     fn body_with_source_map(
         &self,