diff --git a/sys/mips/atheros/ar71xx_ehci.c b/sys/mips/atheros/ar71xx_ehci.c
index c04e069b83a..d3bb5f60bf1 100644
--- a/sys/mips/atheros/ar71xx_ehci.c
+++ b/sys/mips/atheros/ar71xx_ehci.c
@@ -157,6 +157,8 @@ ar71xx_ehci_attach(device_t self)
 		case AR71XX_SOC_AR7242:
 		case AR71XX_SOC_AR9130:
 		case AR71XX_SOC_AR9132:
+		case AR71XX_SOC_AR9330:
+		case AR71XX_SOC_AR9331:
 			sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
 			break;
 		default: