diff -uprN mate-control-center-orig/font-viewer/mate-font-viewer.thumbnailer mate-control-center/font-viewer/mate-font-viewer.thumbnailer
--- mate-control-center-orig/font-viewer/mate-font-viewer.thumbnailer	2015-08-03 21:57:50.000000000 +0200
+++ mate-control-center/font-viewer/mate-font-viewer.thumbnailer	2015-08-23 15:40:07.884018477 +0200
@@ -1,4 +1,4 @@
 [Thumbnailer Entry]
 TryExec=mate-thumbnail-font
-Exec=mate-thumbnail-font %u %o
+Exec=mate-thumbnail-font --size %s %u %o
 MimeType=application/x-font-ttf;application/x-font-type1;application/x-font-pcf;application/x-font-otf