diff --git a/mlir/include/mlir/IR/AttrTypeSubElements.h b/mlir/include/mlir/IR/AttrTypeSubElements.h
--- a/mlir/include/mlir/IR/AttrTypeSubElements.h
+++ b/mlir/include/mlir/IR/AttrTypeSubElements.h
@@ -413,6 +413,9 @@
                                   function_ref<void(Attribute)> walkAttrsFn,
                                   function_ref<void(Type)> walkTypesFn) {
   using ImplT = typename T::ImplType;
+  (void)derived;
+  (void)walkAttrsFn;
+  (void)walkTypesFn;
   if constexpr (llvm::is_detected<has_get_as_key, ImplT>::value) {
     auto key = static_cast<ImplT *>(derived.getImpl())->getAsKey();