diff --git a/sys/net/if_vlan.c b/sys/net/if_vlan.c
index 1be288882019..54c4833bcddb 100644
--- a/sys/net/if_vlan.c
+++ b/sys/net/if_vlan.c
@@ -1775,6 +1775,27 @@ vlan_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 		}
 		break;
 
+	case SIOCSIFCAP:
+		VLAN_LOCK();
+		if (TRUNK(ifv) != NULL) {
+			p = PARENT(ifv);
+			VLAN_UNLOCK();
+			if ((p->if_type != IFT_ETHER) &&
+			    (ifr->ifr_reqcap & IFCAP_VLAN_HWTAGGING) == 0) {
+				error = EINVAL;
+				break;
+			}
+			error = (*p->if_ioctl)(p, cmd, data);
+			if (error)
+				break;
+			/* Propogate vlan interface capabilities */
+			vlan_trunk_capabilities(p);
+		} else {
+			VLAN_UNLOCK();
+			error = EINVAL;
+		}
+		break;
+
 	default:
 		error = EINVAL;
 		break;