=== src/base/ftsynth.c
==================================================================
--- src/base/ftsynth.c  (revision 922)
+++ src/base/ftsynth.c  (local)
@@ -122,6 +122,9 @@
     /* modify the metrics accordingly */
     if ( !error )
     {
+      slot->advance.x += xstr;
+      slot->advance.y += ystr;
+
       slot->metrics.width        += xstr;
       slot->metrics.height       += ystr;
       slot->metrics.horiBearingY += ystr;