1 files changed, 1 insertions, 1 deletions

diff --git a/utils/rbutilqt/base/ttsexes.h b/utils/rbutilqt/base/ttsexes.h
index 5707c827fe..470b007e92 100644
--- a/utils/rbutilqt/base/ttsexes.h
+++ b/utils/rbutilqt/base/ttsexes.h
@@ -35,7 +35,7 @@ class TTSExes : public TTSBase
     Q_OBJECT
     public:
         TTSExes(QObject* parent=nullptr);
-        TTSStatus voice(QString text, QString wavfile, QString *errStr);
+        TTSStatus voice(const QString& text, const QString& wavfile, QString *errStr);
         bool start(QString *errStr);
         bool stop() {return true;}
         QString voiceVendor(void) { return QString(); }