diff --git a/compiler/rustc_hir/src/def.rs b/compiler/rustc_hir/src/def.rs
index 2662f5661ba50..37d9b2ffd6ab8 100644
--- a/compiler/rustc_hir/src/def.rs
+++ b/compiler/rustc_hir/src/def.rs
@@ -207,7 +207,6 @@ impl DefKind {
             | DefKind::Enum
             | DefKind::Variant
             | DefKind::Trait
-            | DefKind::OpaqueTy
             | DefKind::TyAlias
             | DefKind::ForeignTy
             | DefKind::TraitAlias
@@ -234,7 +233,8 @@ impl DefKind {
             | DefKind::Use
             | DefKind::ForeignMod
             | DefKind::GlobalAsm
-            | DefKind::Impl { .. } => None,
+            | DefKind::Impl { .. }
+            | DefKind::OpaqueTy => None,
         }
     }