diff --git a/sys/modules/netgraph/netflow/Makefile b/sys/modules/netgraph/netflow/Makefile
index 365c99b3ddbe..35e8e6db7f36 100644
--- a/sys/modules/netgraph/netflow/Makefile
+++ b/sys/modules/netgraph/netflow/Makefile
@@ -6,6 +6,6 @@
 .PATH: ${SRCTOP}/sys/netgraph/netflow
 
 KMOD=   ng_netflow
-SRCS=   ng_netflow.c netflow.c netflow_v9.c opt_inet6.h opt_route.h
+SRCS=   ng_netflow.c netflow.c netflow_v9.c opt_inet.h opt_inet6.h opt_route.h
 
 .include <bsd.kmod.mk>