1 files changed, 1 insertions, 1 deletions

diff --git a/utils/rbutilqt/base/ttsfestival.h b/utils/rbutilqt/base/ttsfestival.h
index 5f6dc13ab5..28409e2a4e 100644
--- a/utils/rbutilqt/base/ttsfestival.h
+++ b/utils/rbutilqt/base/ttsfestival.h
@@ -40,7 +40,7 @@ class TTSFestival : public TTSBase
         ~TTSFestival();
         bool start(QString *errStr);
         bool stop();
-        TTSStatus voice(QString text,QString wavfile,  QString *errStr);
+        TTSStatus voice(const QString& text, const QString& wavfile, QString *errStr);
         QString voiceVendor(void) { return QString(); }
         Capabilities capabilities();