diff --git a/src/libs/qmljs/qmljscodeformatter.cpp b/src/libs/qmljs/qmljscodeformatter.cpp
index 813d5610456..8c26a9ca420 100644
--- a/src/libs/qmljs/qmljscodeformatter.cpp
+++ b/src/libs/qmljs/qmljscodeformatter.cpp
@@ -1019,10 +1019,10 @@ void CodeFormatter::dump() const
     qDebug() << "Current indent depth:" << m_indentDepth;
 }
 
-QByteArray CodeFormatter::stateToString(int type) const
+QString CodeFormatter::stateToString(int type) const
 {
     const QMetaEnum &metaEnum = staticMetaObject.enumerator(staticMetaObject.indexOfEnumerator("StateType"));
-    return metaEnum.valueToKey(type);
+    return QString::fromUtf8(metaEnum.valueToKey(type));
 }
 
 QtStyleCodeFormatter::QtStyleCodeFormatter()
diff --git a/src/libs/qmljs/qmljscodeformatter.h b/src/libs/qmljs/qmljscodeformatter.h
index fdd49671d1a..fa00963e471 100644
--- a/src/libs/qmljs/qmljscodeformatter.h
+++ b/src/libs/qmljs/qmljscodeformatter.h
@@ -278,7 +278,7 @@ protected:
     bool isExpressionEndState(int type) const;
 
     void dump() const;
-    QByteArray stateToString(int type) const;
+    QString stateToString(int type) const;
 
 private:
     void recalculateStateAfter(const QTextBlock &block);