diff --git a/crates/ra_hir/src/semantics.rs b/crates/ra_hir/src/semantics.rs
index 60392947e8d..74901e318a5 100644
--- a/crates/ra_hir/src/semantics.rs
+++ b/crates/ra_hir/src/semantics.rs
@@ -268,6 +268,7 @@ fn to_def<DB: HirDatabase>(sema: &Semantics<DB>, src: InFile<Self>) -> Option<Se
     (crate::Static, ast::StaticDef, static_to_def),
     (crate::Function, ast::FnDef, fn_to_def),
     (crate::StructField, ast::RecordFieldDef, record_field_to_def),
+    (crate::StructField, ast::TupleFieldDef, tuple_field_to_def),
     (crate::EnumVariant, ast::EnumVariant, enum_variant_to_def),
     (crate::TypeParam, ast::TypeParam, type_param_to_def),
     (crate::MacroDef, ast::MacroCall, macro_call_to_def), // this one is dubious, not all calls are macros
diff --git a/crates/ra_hir/src/semantics/source_to_def.rs b/crates/ra_hir/src/semantics/source_to_def.rs
index 303610dc482..884b535b291 100644
--- a/crates/ra_hir/src/semantics/source_to_def.rs
+++ b/crates/ra_hir/src/semantics/source_to_def.rs
@@ -94,13 +94,18 @@ pub(super) fn type_alias_to_def(
     ) -> Option<TypeAliasId> {
         self.to_def(src, keys::TYPE_ALIAS)
     }
-    //TODO: tuple field
     pub(super) fn record_field_to_def(
         &mut self,
         src: InFile<ast::RecordFieldDef>,
     ) -> Option<StructFieldId> {
         self.to_def(src, keys::RECORD_FIELD)
     }
+    pub(super) fn tuple_field_to_def(
+        &mut self,
+        src: InFile<ast::TupleFieldDef>,
+    ) -> Option<StructFieldId> {
+        self.to_def(src, keys::TUPLE_FIELD)
+    }
     pub(super) fn enum_variant_to_def(
         &mut self,
         src: InFile<ast::EnumVariant>,