diff --git a/sys/dev/alc/if_alc.c b/sys/dev/alc/if_alc.c
index 351ab054fcf..2df1c8d9be6 100644
--- a/sys/dev/alc/if_alc.c
+++ b/sys/dev/alc/if_alc.c
@@ -3556,7 +3556,7 @@ alc_stop_queue(struct alc_softc *sc)
 	}
 	/* Disable TxQ. */
 	reg = CSR_READ_4(sc, ALC_TXQ_CFG);
-	if ((reg & TXQ_CFG_ENB) == 0) {
+	if ((reg & TXQ_CFG_ENB) != 0) {
 		reg &= ~TXQ_CFG_ENB;
 		CSR_WRITE_4(sc, ALC_TXQ_CFG, reg);
 	}