diff --git a/3rdparty/fonts/fnt.cxx b/3rdparty/fonts/fnt.cxx
index 5e3d381..54eddc3 100644
--- a/3rdparty/fonts/fnt.cxx
+++ b/3rdparty/fonts/fnt.cxx
@@ -189,6 +189,15 @@ void fntTexFont::getBBox ( const char *s,
     }
     if ( (cc & 0XE0) == 0XE0) {
       SG_LOG(SG_GUI,SG_ALERT, "UTF8 cc=" << cc);
+
+      int x = cc << 4;
+      cc =  (unsigned char) *(s++) ;
+
+      x= x + (cc<<2) >> 4;
+
+      int y = (cc & 0X03 )<< 6 + (unsigned char) *(s++) & 0X7F
+
+      cc = x * 256 + y;
     }
 
     if ( ! exists [ cc ] )