diff --git a/mlir/include/mlir/IR/AsmState.h b/mlir/include/mlir/IR/AsmState.h
index b0458f5d408ef..df7e5c3b6f743 100644
--- a/mlir/include/mlir/IR/AsmState.h
+++ b/mlir/include/mlir/IR/AsmState.h
@@ -311,6 +311,7 @@ class ParserConfig {
   void attachResourceParser(std::unique_ptr<AsmResourceParser> parser) {
     StringRef name = parser->getName();
     auto it = resourceParsers.try_emplace(name, std::move(parser));
+    (void)it;
     assert(it.second &&
            "resource parser already registered with the given name");
   }