diff --git a/sys/netgraph/atm/ng_atm.h b/sys/netgraph/atm/ng_atm.h
index f8cd1c7fbc1e..675b437cab2e 100644
--- a/sys/netgraph/atm/ng_atm.h
+++ b/sys/netgraph/atm/ng_atm.h
@@ -30,8 +30,8 @@
  *
  * $FreeBSD$
  */
-#ifndef _NETGRAPH_ATM_NG_ATM_H
-#define _NETGRAPH_ATM_NG_ATM_H
+#ifndef _NETGRAPH_ATM_NG_ATM_H_
+#define _NETGRAPH_ATM_NG_ATM_H_
 
 #define NG_ATM_NODE_TYPE "atm"
 #define NGM_ATM_COOKIE	960802260
diff --git a/sys/netgraph/atm/ng_sscop.h b/sys/netgraph/atm/ng_sscop.h
index 26de7e210376..17713ca01193 100644
--- a/sys/netgraph/atm/ng_sscop.h
+++ b/sys/netgraph/atm/ng_sscop.h
@@ -30,8 +30,8 @@
  *
  * Netgraph module for Q.2110 SSCOP
  */
-#ifndef _NETGRAPH_ATM_NG_SSCOP_H
-#define _NETGRAPH_ATM_NG_SSCOP_H
+#ifndef _NETGRAPH_ATM_NG_SSCOP_H_
+#define _NETGRAPH_ATM_NG_SSCOP_H_
 
 #define NG_SSCOP_NODE_TYPE "sscop"
 #define NGM_SSCOP_COOKIE	980175044
diff --git a/sys/netgraph/atm/ngatmbase.h b/sys/netgraph/atm/ngatmbase.h
index 70dd275800a8..39153ee419b3 100644
--- a/sys/netgraph/atm/ngatmbase.h
+++ b/sys/netgraph/atm/ngatmbase.h
@@ -31,8 +31,8 @@
  *
  * In-kernel UNI stack message functions.
  */
-#ifndef _NETGRAPH_ATM_NGATMBASE_H
-#define	_NETGRAPH_ATM_NGATMBASE_H
+#ifndef _NETGRAPH_ATM_NGATMBASE_H_
+#define	_NETGRAPH_ATM_NGATMBASE_H_
 
 /* forward declarations */
 struct mbuf;