diff --git a/compiler/rustc_passes/src/dead.rs b/compiler/rustc_passes/src/dead.rs
index b1db66fa52d4b..baf312b968638 100644
--- a/compiler/rustc_passes/src/dead.rs
+++ b/compiler/rustc_passes/src/dead.rs
@@ -265,6 +265,7 @@ impl<'tcx> MarkSymbolVisitor<'tcx> {
             }
             self.insert_def_id(variant.fields[FieldIdx::from_usize(idx)].did);
         }
+        self.insert_def_id(variant.def_id);
     }
 
     fn handle_offset_of(&mut self, expr: &'tcx hir::Expr<'tcx>) {