diff --git a/share/man/man4/Makefile b/share/man/man4/Makefile
index 7849a31763a..5a21af24f1a 100644
--- a/share/man/man4/Makefile
+++ b/share/man/man4/Makefile
@@ -323,6 +323,7 @@ MAN=	aac.4 \
 	ng_btsocket.4 \
 	ng_car.4 \
 	ng_ccatm.4 \
+	ng_checksum.4 \
 	ng_cisco.4 \
 	ng_deflate.4 \
 	ng_device.4 \
diff --git a/sys/modules/netgraph/Makefile b/sys/modules/netgraph/Makefile
index ac674d16d81..56ad7bd4a54 100644
--- a/sys/modules/netgraph/Makefile
+++ b/sys/modules/netgraph/Makefile
@@ -11,6 +11,7 @@ SUBDIR=	async \
 	bpf \
 	bridge \
 	car \
+	checksum \
 	cisco \
 	deflate \
 	device \