diff --git a/3rdparty/fonts/fnt.cxx b/3rdparty/fonts/fnt.cxx
index 71595ad..1ec2dfb 100644
--- a/3rdparty/fonts/fnt.cxx
+++ b/3rdparty/fonts/fnt.cxx
@@ -210,6 +210,8 @@ void fntTexFont::getBBox ( const char *s,
       y= y + (cc & 0x3F);
 
       SG_LOG(SG_GUI,SG_ALERT, "x=" << x << ",y=" << y);
+
+      cc = x * 256 + y;
     }
 
     if ( ! exists [ cc ] )