It's not needed here. Index: sys/net/if_pppx.c =================================================================== RCS file: /cvs/src/sys/net/if_pppx.c,v retrieving revision 1.102 diff -u -p -r1.102 if_pppx.c --- sys/net/if_pppx.c 27 Aug 2020 10:47:52 -0000 1.102 +++ sys/net/if_pppx.c 28 Aug 2020 08:18:08 -0000 @@ -62,7 +62,6 @@ #include <net/if.h> #include <net/if_types.h> -#include <net/netisr.h> #include <netinet/in.h> #include <netinet/if_ether.h> #include <net/if_dl.h> Index: sys/net/pipex.c =================================================================== RCS file: /cvs/src/sys/net/pipex.c,v retrieving revision 1.125 diff -u -p -r1.125 pipex.c --- sys/net/pipex.c 27 Aug 2020 10:47:52 -0000 1.125 +++ sys/net/pipex.c 28 Aug 2020 08:18:08 -0000 @@ -48,7 +48,6 @@ #include <net/radix.h> #include <net/route.h> -#include <net/netisr.h> #include <net/ppp_defs.h> #include <net/ppp-comp.h>