pin
diff --git a/src/lib9/mkfile b/src/lib9/mkfile
index 143ca7d..ca61543 100644
--- a/src/lib9/mkfile
+++ b/src/lib9/mkfile
@@ -128,6 +128,7 @@
 	nulldir.$O\
 	open.$O\
 	opentemp.$O\
+	pin.$O\
 	pipe.$O\
 	post9p.$O\
 	postnote.$O\