diff --git a/sys/modules/cam/Makefile b/sys/modules/cam/Makefile
index b4e37cdb8be..d9788257836 100644
--- a/sys/modules/cam/Makefile
+++ b/sys/modules/cam/Makefile
@@ -8,6 +8,7 @@ KMOD=	cam
 
 # See sys/conf/options for the flags that go into the different opt_*.h files.
 SRCS=	opt_cam.h
+SRCS=	opt_compat.h
 SRCS+=	opt_ada.h
 SRCS+=	opt_scsi.h
 SRCS+=	opt_cd.h