Index: scheduler/printers.c
===================================================================
--- scheduler/printers.c	(revision 8816)
+++ scheduler/printers.c	(working copy)
@@ -3834,7 +3834,7 @@
   for (filter = mimeFirstFilter(MimeDatabase);
        filter;
        filter = mimeNextFilter(MimeDatabase))
-    if (filter->dst == p->filetype)
+    if (filter->dst == p->filetype || filter->dst == p->prefiltertype)
     {
      /*
       * Delete the current filter...