diff --git a/src/corelib/thread/qpromise.h b/src/corelib/thread/qpromise.h
index 9be9526ef6..9db58ad595 100644
--- a/src/corelib/thread/qpromise.h
+++ b/src/corelib/thread/qpromise.h
@@ -46,7 +46,7 @@ public:
 
     // Core QPromise APIs
     QFuture<T> future() const { return d.future(); }
-    template<typename U, typename = QtPrivate::EnableIfSameOrConvertible<U, T>>
+    template<typename U = T, typename = QtPrivate::EnableIfSameOrConvertible<U, T>>
     bool addResult(U &&result, int index = -1)
     {
         return d.reportResult(std::forward<U>(result), index);
diff --git a/tests/auto/corelib/thread/qpromise/tst_qpromise.cpp b/tests/auto/corelib/thread/qpromise/tst_qpromise.cpp
index 6c23884b36..09332f92ef 100644
--- a/tests/auto/corelib/thread/qpromise/tst_qpromise.cpp
+++ b/tests/auto/corelib/thread/qpromise/tst_qpromise.cpp
@@ -24,6 +24,7 @@ private slots:
     void promise();
     void futureFromPromise();
     void addResult();
+    void addResultWithBracedInitializer();
     void addResultOutOfOrder();
 #ifndef QT_NO_EXCEPTIONS
     void setException();
@@ -196,6 +197,20 @@ void tst_QPromise::addResult()
     }
 }
 
+void tst_QPromise::addResultWithBracedInitializer() // QTBUG-111826
+{
+    struct MyClass
+    {
+        QString strValue;
+        int intValue = 0;
+    };
+
+    {
+        QPromise<MyClass> myPromise;
+        myPromise.addResult({"bar", 1});
+    }
+}
+
 void tst_QPromise::addResultOutOfOrder()
 {
     // Compare results available in QFuture to expected results