diff --git a/Makefile.inc1 b/Makefile.inc1
index 4ec2983b0d4d..74435b27d1df 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -231,7 +231,7 @@ USRDIRS=	usr/bin usr/lib/compat/aout usr/games usr/libdata/ldscripts \
 		usr/share/tmac/mdoc usr/share/tmac/mm
 
 INCDIRS=	arpa g++/std isc objc protocols readline rpc rpcsvc openssl \
-		security ss
+		security
 
 #
 # buildworld