diff --git a/sys/net/if.c b/sys/net/if.c
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -4809,6 +4809,12 @@
 	ifp->if_debugnet_methods = m;
 }
 
+int
+if_gettype(if_t ifp)
+{
+	return (ifp->if_type);
+}
+
 #ifdef DDB
 static void
 if_show_ifnet(struct ifnet *ifp)
diff --git a/sys/net/if_var.h b/sys/net/if_var.h
--- a/sys/net/if_var.h
+++ b/sys/net/if_var.h
@@ -584,6 +584,7 @@
 char *if_allocdescr(size_t sz, int malloc_flag);
 void if_freedescr(char *descrbuf);
 int if_getalloctype(const if_t ifp);
+int if_gettype(const if_t ifp);
 int if_setdev(if_t ifp, void *dev);
 int if_setdrvflagbits(if_t ifp, int if_setflags, int clear_flags);
 int if_getdrvflags(const if_t ifp);
diff --git a/sys/net/if_vlan_var.h b/sys/net/if_vlan_var.h
--- a/sys/net/if_vlan_var.h
+++ b/sys/net/if_vlan_var.h
@@ -143,15 +143,15 @@
 } while (0)
 
 #define	VLAN_TRUNKDEV(_ifp)					\
-	((_ifp)->if_type == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL)
+	(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_trunkdev_p)((_ifp)) : NULL)
 #define	VLAN_TAG(_ifp, _vid)					\
-	((_ifp)->if_type == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL)
+	(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_tag_p)((_ifp), (_vid)) : EINVAL)
 #define	VLAN_PCP(_ifp, _pcp)					\
-	((_ifp)->if_type == IFT_L2VLAN ? (*vlan_pcp_p)((_ifp), (_pcp)) : EINVAL)
+	(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_pcp_p)((_ifp), (_pcp)) : EINVAL)
 #define	VLAN_COOKIE(_ifp)					\
-	((_ifp)->if_type == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL)
+	(if_gettype(_ifp) == IFT_L2VLAN ? (*vlan_cookie_p)((_ifp)) : NULL)
 #define	VLAN_SETCOOKIE(_ifp, _cookie)				\
-	((_ifp)->if_type == IFT_L2VLAN ?			\
+	(if_gettype(_ifp) == IFT_L2VLAN ?			\
 	    (*vlan_setcookie_p)((_ifp), (_cookie)) : EINVAL)
 #define	VLAN_DEVAT(_ifp, _vid)					\
 	((_ifp)->if_vlantrunk != NULL ? (*vlan_devat_p)((_ifp), (_vid)) : NULL)