diff --git a/target/linux/brcm63xx/config-2.6.27 b/target/linux/brcm63xx/config-2.6.27
index bcf9fd244..9f56d3e1a 100644
--- a/target/linux/brcm63xx/config-2.6.27
+++ b/target/linux/brcm63xx/config-2.6.27
@@ -253,6 +253,7 @@ CONFIG_TCP_CONG_BIC=y
 CONFIG_TICK_ONESHOT=y
 CONFIG_TRAD_SIGNALS=y
 CONFIG_USB_EHCI_BIG_ENDIAN_MMIO=y
+# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
 CONFIG_USB_OHCI_BIG_ENDIAN_DESC=y
 CONFIG_USB_OHCI_BIG_ENDIAN_MMIO=y
 CONFIG_USB_SUPPORT=y