diff --git a/print/Makefile b/print/Makefile
index ee16ae93c5ca..9e4cccc0d859 100644
--- a/print/Makefile
+++ b/print/Makefile
@@ -13,6 +13,7 @@
     SUBDIR += afm
     SUBDIR += amspsfnt
     SUBDIR += apsfilter
+    SUBDIR += apsfilter6
     SUBDIR += asprint
     SUBDIR += auctex
     SUBDIR += bibcard