diff --git a/sys/Makefile b/sys/Makefile
index 7d88c4ecdf2..e5bd3cf142b 100644
--- a/sys/Makefile
+++ b/sys/Makefile
@@ -3,7 +3,7 @@
 # Directories to include in cscope name file and TAGS.
 CSCOPEDIRS=	boot bsm cam cddl compat conf contrib crypto ddb dev fs gdb \
 		geom gnu isa kern libkern modules net net80211 \
-		netgraph netinet netinet6 netipsec netnatm netpfil \
+		netgraph netinet netinet6 netipsec netpfil \
 		netsmb nfs nfsclient nfsserver nlm ofed opencrypto \
 		rpc security sys ufs vm xdr xen ${CSCOPE_ARCHDIR}
 .if !defined(CSCOPE_ARCHDIR)