diff --git a/sys/compat/linux/linux_ipc.c b/sys/compat/linux/linux_ipc.c
index 4973c8d3622..9d7a972c000 100644
--- a/sys/compat/linux/linux_ipc.c
+++ b/sys/compat/linux/linux_ipc.c
@@ -25,9 +25,11 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *  $Id: linux_ipc.c,v 1.3 1995/12/15 05:07:20 peter Exp $
+ *  $Id: linux_ipc.c,v 1.4 1995/12/29 22:12:14 sos Exp $
  */
 
+#include "opt_sysvipc.h"
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/sysproto.h>
diff --git a/sys/i386/linux/linux_ipc.c b/sys/i386/linux/linux_ipc.c
index 4973c8d3622..9d7a972c000 100644
--- a/sys/i386/linux/linux_ipc.c
+++ b/sys/i386/linux/linux_ipc.c
@@ -25,9 +25,11 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- *  $Id: linux_ipc.c,v 1.3 1995/12/15 05:07:20 peter Exp $
+ *  $Id: linux_ipc.c,v 1.4 1995/12/29 22:12:14 sos Exp $
  */
 
+#include "opt_sysvipc.h"
+
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/sysproto.h>