1 files changed, 10 insertions, 2 deletions

diff --git a/crates/ra_hir_def/src/diagnostics.rs b/crates/ra_hir_def/src/diagnostics.rs
index 30db48f86..be9612846 100644
--- a/crates/ra_hir_def/src/diagnostics.rs
+++ b/crates/ra_hir_def/src/diagnostics.rs
@@ -2,7 +2,7 @@
 
 use std::any::Any;
 
-use hir_expand::diagnostics::Diagnostic;
+use hir_expand::diagnostics::{AstDiagnostic, Diagnostic};
 use ra_syntax::{ast, AstPtr, SyntaxNodePtr};
 
 use hir_expand::{HirFileId, InFile};
@@ -18,10 +18,18 @@ impl Diagnostic for UnresolvedModule {
     fn message(&self) -> String {
         "unresolved module".to_string()
     }
-    fn source(&self) -> InFile<SyntaxNodePtr> {
+    fn presentation(&self) -> InFile<SyntaxNodePtr> {
         InFile::new(self.file, self.decl.clone().into())
     }
     fn as_any(&self) -> &(dyn Any + Send + 'static) {
         self
     }
 }
+
+impl AstDiagnostic for UnresolvedModule {
+    type AST = ast::Module;
+    fn fix_source(&self, db: &dyn hir_expand::db::AstDatabase) -> Self::AST {
+        let root = db.parse_or_expand(self.file).unwrap();
+        self.decl.to_node(&root)
+    }
+}