diff --git a/src/Sound/voice.cxx b/src/Sound/voice.cxx
index fc90066..f34218f 100644
--- a/src/Sound/voice.cxx
+++ b/src/Sound/voice.cxx
@@ -199,7 +199,7 @@ FGFestivalVoice::~FGFestivalVoice()
 void FGVoiceMgr::FGVoice::pushMessage( const string & m)
 {
 
-    FGLocale::utf8toLatin1(m);
+    FGLocale::utf8toLatin1(&m);
 
 
 	_msg.push(m);