diff --git a/mlir/include/mlir/Support/LogicalResult.h b/mlir/include/mlir/Support/LogicalResult.h
--- a/mlir/include/mlir/Support/LogicalResult.h
+++ b/mlir/include/mlir/Support/LogicalResult.h
@@ -84,6 +84,7 @@
   }
   FailureOr() : FailureOr(failure()) {}
   FailureOr(T &&y) : Optional<T>(std::forward<T>(y)) {}
+  FailureOr(const T &y) : Optional<T>(y) {}
 
   operator LogicalResult() const { return success(this->hasValue()); }