diff --git a/sys/netinet/fil.c b/sys/netinet/fil.c
index bb6eb52cd3e3..cc6d3273733a 100644
--- a/sys/netinet/fil.c
+++ b/sys/netinet/fil.c
@@ -20,7 +20,7 @@ static const char rcsid[] = "@(#)$FreeBSD$";
     defined(_KERNEL)
 # include "opt_ipfilter_log.h"
 #endif
-#if defined(KERNEL) && defined(__FreeBSD_version) && \
+#if defined(_KERNEL) && defined(__FreeBSD_version) && \
     (__FreeBSD_version >= 220000)
 # include <sys/filio.h>
 # include <sys/fcntl.h>
diff --git a/sys/netinet/ip_auth.c b/sys/netinet/ip_auth.c
index f0fd50037fe0..2b29cae267d7 100644
--- a/sys/netinet/ip_auth.c
+++ b/sys/netinet/ip_auth.c
@@ -20,7 +20,7 @@ static const char rcsid[] = "@(#)$FreeBSD$";
 # include <stdlib.h>
 # include <string.h>
 #endif
-#if defined(KERNEL) && (__FreeBSD_version >= 220000)
+#if defined(_KERNEL) && (__FreeBSD_version >= 220000)
 # include <sys/filio.h>
 # include <sys/fcntl.h>
 #else
diff --git a/sys/netinet/ip_frag.c b/sys/netinet/ip_frag.c
index af07c3d00624..156a9851900c 100644
--- a/sys/netinet/ip_frag.c
+++ b/sys/netinet/ip_frag.c
@@ -25,7 +25,7 @@ static const char rcsid[] = "@(#)$FreeBSD$";
 # include <string.h>
 # include <stdlib.h>
 #endif
-#if defined(KERNEL) && (__FreeBSD_version >= 220000)
+#if defined(_KERNEL) && (__FreeBSD_version >= 220000)
 # include <sys/filio.h>
 # include <sys/fcntl.h>
 #else
diff --git a/sys/netinet/ip_nat.c b/sys/netinet/ip_nat.c
index e85bc57214e0..be451163d066 100644
--- a/sys/netinet/ip_nat.c
+++ b/sys/netinet/ip_nat.c
@@ -31,7 +31,7 @@ static const char rcsid[] = "@(#)$FreeBSD$";
 # include <string.h>
 # include <stdlib.h>
 #endif
-#if defined(KERNEL) && (__FreeBSD_version >= 220000)
+#if defined(_KERNEL) && (__FreeBSD_version >= 220000)
 # include <sys/filio.h>
 # include <sys/fcntl.h>
 #else
diff --git a/sys/netinet/ip_state.c b/sys/netinet/ip_state.c
index 95e87938e676..c0e5a6235537 100644
--- a/sys/netinet/ip_state.c
+++ b/sys/netinet/ip_state.c
@@ -29,7 +29,7 @@ static const char rcsid[] = "@(#)$FreeBSD$";
 #  include <linux/module.h>
 # endif
 #endif
-#if defined(KERNEL) && (__FreeBSD_version >= 220000)
+#if defined(_KERNEL) && (__FreeBSD_version >= 220000)
 # include <sys/filio.h>
 # include <sys/fcntl.h>
 # if (__FreeBSD_version >= 300000) && !defined(IPFILTER_LKM)