diff --git a/sys/modules/fs/linprocfs/Makefile b/sys/modules/fs/linprocfs/Makefile
index cdc587f107c4..e7dced900b28 100644
--- a/sys/modules/fs/linprocfs/Makefile
+++ b/sys/modules/fs/linprocfs/Makefile
@@ -4,6 +4,7 @@
 
 KMOD=	linprocfs
 SRCS=	vnode_if.h \
+	opt_linux.h \
 	linprocfs.c
 
 .include <bsd.kmod.mk>