diff --git a/sys/net/if_gre.h b/sys/net/if_gre.h
--- a/sys/net/if_gre.h
+++ b/sys/net/if_gre.h
@@ -85,6 +85,9 @@
 struct gre_softc {
 	struct ifnet		*gre_ifp;
 	int			gre_family;	/* AF of delivery header */
+	uint32_t		gre_flags;
+#define GRE_FLAG_RUNNING	0x0001
+
 	uint32_t		gre_iseq;
 	uint32_t		gre_oseq;
 	uint32_t		gre_key;
diff --git a/sys/net/if_gre.c b/sys/net/if_gre.c
--- a/sys/net/if_gre.c
+++ b/sys/net/if_gre.c
@@ -190,6 +190,7 @@
 #endif
 	GRE2IFP(sc)->if_capabilities |= IFCAP_LINKSTATE;
 	GRE2IFP(sc)->if_capenable |= IFCAP_LINKSTATE;
+	GRE2IFP(sc)->if_drv_flags |= IFF_DRV_RUNNING;
 	if_attach(GRE2IFP(sc));
 	bpfattach(GRE2IFP(sc), DLT_NULL, sizeof(u_int32_t));
 	return (0);
@@ -415,7 +416,7 @@
 		NET_EPOCH_CALL(gre_sofree, &gs->epoch_ctx);
 		sc->gre_so = NULL;
 	}
-	GRE2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
+	sc->gre_flags &= ~GRE_FLAG_RUNNING;
 	if_link_state_change(GRE2IFP(sc), LINK_STATE_DOWN);
 }
 
@@ -539,7 +540,7 @@
 	}
 	if (flags & GRE_FLAGS_KP) {
 #ifdef notyet
-        /* 
+        /*
          * XXX: The current implementation uses the key only for outgoing
          * packets. But we can check the key value here, or even in the
          * encapcheck function.
@@ -702,7 +703,7 @@
 	sc = ifp->if_softc;
 	if ((ifp->if_flags & IFF_MONITOR) != 0 ||
 	    (ifp->if_flags & IFF_UP) == 0 ||
-	    (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 ||
+	    (sc->gre_flags & GRE_FLAG_RUNNING) == 0 ||
 	    sc->gre_family == 0 ||
 	    (error = if_tunnel_check_nesting(ifp, m, MTAG_GRE,
 		V_max_gre_nesting)) != 0) {
diff --git a/sys/netinet/ip_gre.c b/sys/netinet/ip_gre.c
--- a/sys/netinet/ip_gre.c
+++ b/sys/netinet/ip_gre.c
@@ -187,14 +187,14 @@
 {
 
 	if (in_localip(sc->gre_oip.ip_src))
-		GRE2IFP(sc)->if_drv_flags |= IFF_DRV_RUNNING;
+		sc->gre_flags |= GRE_FLAG_RUNNING;
 	else
-		GRE2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
+		sc->gre_flags &= ~GRE_FLAG_RUNNING;
 }
 
 /*
  * ifaddr_event handler.
- * Clear IFF_DRV_RUNNING flag when ingress address disappears to prevent
+ * Clear GRE_FLAG_RUNNING flag when ingress address disappears to prevent
  * source address spoofing.
  */
 static void
@@ -381,7 +381,7 @@
 	CK_LIST_INSERT_HEAD(&GRE_SRCHASH(sc->gre_oip.ip_src.s_addr),
 	    sc, srchash);
 
-	/* Set IFF_DRV_RUNNING if interface is ready */
+	/* Set GRE_FLAG_RUNNING if interface is ready */
 	NET_EPOCH_ENTER(et);
 	in_gre_set_running(sc);
 	NET_EPOCH_EXIT(et);
diff --git a/sys/netinet6/ip6_gre.c b/sys/netinet6/ip6_gre.c
--- a/sys/netinet6/ip6_gre.c
+++ b/sys/netinet6/ip6_gre.c
@@ -179,14 +179,14 @@
 {
 
 	if (in6_localip(&sc->gre_oip6.ip6_src))
-		GRE2IFP(sc)->if_drv_flags |= IFF_DRV_RUNNING;
+		sc->gre_flags |= GRE_FLAG_RUNNING;
 	else
-		GRE2IFP(sc)->if_drv_flags &= ~IFF_DRV_RUNNING;
+		sc->gre_flags &= ~GRE_FLAG_RUNNING;
 }
 
 /*
  * ifaddr_event handler.
- * Clear IFF_DRV_RUNNING flag when ingress address disappears to prevent
+ * Clear GRE_FLAG_RUNNING flag when ingress address disappears to prevent
  * source address spoofing.
  */
 static void
@@ -381,7 +381,7 @@
 		CK_LIST_INSERT_HEAD(&GRE_HASH_SC(sc), sc, chain);
 	CK_LIST_INSERT_HEAD(&GRE_SRCHASH(&sc->gre_oip6.ip6_src), sc, srchash);
 
-	/* Set IFF_DRV_RUNNING if interface is ready */
+	/* Set GRE_FLAG_RUNNING if interface is ready */
 	in6_gre_set_running(sc);
 	return (0);
 }