diff --git a/configs/rock64-rk3328_defconfig b/configs/rock64-rk3328_defconfig
index 640fe55..bc333a5 100644
--- a/configs/rock64-rk3328_defconfig
+++ b/configs/rock64-rk3328_defconfig
@@ -106,6 +106,7 @@
 CONFIG_USB_EHCI_GENERIC=y
 CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_GENERIC=y
+CONFIG_SYS_USB_OHCI_MAX_ROOT_PORTS=1
 CONFIG_USB_DWC2=y
 CONFIG_USB_DWC3=y
 # CONFIG_USB_DWC3_GADGET is not set