--- Net2/netinet/in_proto.c	2018/04/24 18:04:09	1.1.1.2
+++ Net2/netinet/in_proto.c	2018/04/24 18:13:52	1.1.1.4
@@ -30,7 +30,8 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)in_proto.c	7.5 (Berkeley) 6/28/90
+ *	from: @(#)in_proto.c	7.5 (Berkeley) 6/28/90
+ *	in_proto.c,v 1.3 1993/05/20 03:50:08 cgd Exp
  */
 
 #include "param.h"
@@ -60,8 +61,7 @@ int	rip_input(),rip_output(),rip_ctloutp
  * Using the raw interface entry to get the timer routine
  * in is a kludge.
  */
-#include "imp.h"
-#if NIMP > 0
+#ifdef IMP
 int	rimp_output(), hostslowtimo();
 #endif