tweaks
diff --git a/unix/mkfile.mk b/unix/mkfile.mk
index 5b5ebbe..5af2970 100644
--- a/unix/mkfile.mk
+++ b/unix/mkfile.mk
@@ -8,6 +8,7 @@
 	mk.h\
 	sys.h\
 	fns.h\
+	mk.pdf\
 	`{9 ls -p $PLAN9/src/cmd/mk/*.c}\
 
 WHAT=mk