diff --git a/src/qmlcompiler/qqmljscodegenerator.cpp b/src/qmlcompiler/qqmljscodegenerator.cpp
index d6875a273f..b8bd89fa8b 100644
--- a/src/qmlcompiler/qqmljscodegenerator.cpp
+++ b/src/qmlcompiler/qqmljscodegenerator.cpp
@@ -4054,12 +4054,14 @@ QString QQmlJSCodeGenerator::convertContained(const QQmlJSRegisterContent &from,
     if (!m_typeResolver->registerIsStoredIn(to, m_typeResolver->varType()) &&
             !m_typeResolver->registerIsStoredIn(to, m_typeResolver->jsPrimitiveType())) {
         reject(u"internal conversion into unsupported wrapper type."_s);
+        return QString();
     }
 
     bool isExtension = false;
     if (m_typeResolver->canPopulate(containedTo, containedFrom, &isExtension)) {
         reject(u"populating "_s + containedTo->internalName()
                + u" from "_s + containedFrom->internalName());
+        return QString();
     } else if (const auto ctor = m_typeResolver->selectConstructor(
                 containedTo, containedFrom, &isExtension); ctor.isValid()) {
         const auto argumentTypes = ctor.parameters();
diff --git a/tests/auto/qml/qmlcppcodegen/data/CMakeLists.txt b/tests/auto/qml/qmlcppcodegen/data/CMakeLists.txt
index dc4216ba6d..f832c1b516 100644
--- a/tests/auto/qml/qmlcppcodegen/data/CMakeLists.txt
+++ b/tests/auto/qml/qmlcppcodegen/data/CMakeLists.txt
@@ -215,6 +215,7 @@ set(qml_files
     registerPropagation.qml
     registerelimination.qml
     renameAdjust.qml
+    returnAfterReject.qml
     revisions.qml
     scopeIdLookup.qml
     scopeVsObject.qml
diff --git a/tests/auto/qml/qmlcppcodegen/data/returnAfterReject.qml b/tests/auto/qml/qmlcppcodegen/data/returnAfterReject.qml
new file mode 100644
index 0000000000..e0b85eb270
--- /dev/null
+++ b/tests/auto/qml/qmlcppcodegen/data/returnAfterReject.qml
@@ -0,0 +1,15 @@
+import QtQml
+
+QtObject {
+    id: remaining
+
+    property int bar: 0
+
+    Component.onCompleted: {
+        let remainingTime = 123
+        if (remainingTime < 0) {
+            remainingTime += 24 * 60 * 60
+        }
+        remaining.bar = isNaN(remainingTime) ? 0 : remainingTime
+    }
+}
diff --git a/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp b/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
index 30a3eca882..a0416ac159 100644
--- a/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
+++ b/tests/auto/qml/qmlcppcodegen/tst_qmlcppcodegen.cpp
@@ -183,6 +183,7 @@ private slots:
     void registerElimination();
     void registerPropagation();
     void renameAdjust();
+    void returnAfterReject();
     void revisions();
     void scopeIdLookup();
     void scopeObjectDestruction();
@@ -3802,6 +3803,16 @@ void tst_QmlCppCodegen::renameAdjust()
     QVERIFY(o);
 }
 
+void tst_QmlCppCodegen::returnAfterReject()
+{
+    QQmlEngine engine;
+    QQmlComponent c(&engine, QUrl(u"qrc:/qt/qml/TestTypes/returnAfterReject.qml"_s));
+    QVERIFY2(c.isReady(), qPrintable(c.errorString()));
+    QScopedPointer<QObject> o(c.create());
+    QVERIFY(o);
+    QCOMPARE(o->property("bar").toInt(), 123);
+}
+
 void tst_QmlCppCodegen::revisions()
 {
     QQmlEngine engine;