diff --git a/mlir/include/mlir/IR/DialectImplementation.h b/mlir/include/mlir/IR/DialectImplementation.h
--- a/mlir/include/mlir/IR/DialectImplementation.h
+++ b/mlir/include/mlir/IR/DialectImplementation.h
@@ -87,7 +87,7 @@
 struct FieldParser<IntT,
                    std::enable_if_t<std::is_integral<IntT>::value, IntT>> {
   static FailureOr<IntT> parse(AsmParser &parser) {
-    IntT value;
+    IntT value = 0;
     if (parser.parseInteger(value))
       return failure();
     return value;