--- src/sys/dev/netif/rue/if_rue.c	2005/09/19 02:53:27	1.1
+++ src/sys/dev/netif/rue/if_rue.c	2005/09/19 04:22:15	1.2
@@ -1405,8 +1405,10 @@ rue_stop(struct rue_softc *sc)
 	}
 
 #ifdef RUE_INTR_PIPE
-	free(sc->rue_cdata.rue_ibuf, M_USBDEV);
-	sc->rue_cdata.rue_ibuf = NULL;
+	if (sc->rue_cdata.rue_ibuf != NULL) {
+		free(sc->rue_cdata.rue_ibuf, M_USBDEV);
+		sc->rue_cdata.rue_ibuf = NULL;
+	}
 #endif
 
 	sc->rue_link = 0;