diff --git a/chip/g/usb.c b/chip/g/usb.c
index 32b347e3ab..2562461b2e 100644
--- a/chip/g/usb.c
+++ b/chip/g/usb.c
@@ -331,8 +331,12 @@ static enum {
 } device_state;
 static uint8_t configuration_value;
 
+#ifndef CONFIG_USB_SELECT_PHY_DEFAULT
+#define CONFIG_USB_SELECT_PHY_DEFAULT USB_SEL_PHY1
+#endif
+
 /* Default PHY to use */
-static uint32_t which_phy = USB_SEL_PHY1;
+static uint32_t which_phy = CONFIG_USB_SELECT_PHY_DEFAULT;
 
 void usb_select_phy(uint32_t phy)
 {
diff --git a/include/config.h b/include/config.h
index 9248b5185c..90f13b3dcc 100644
--- a/include/config.h
+++ b/include/config.h
@@ -2483,6 +2483,8 @@
 
 /* Support control of multiple PHY */
 #undef CONFIG_USB_SELECT_PHY
+/* Select which USB PHY will be used at startup */
+#undef CONFIG_USB_SELECT_PHY_DEFAULT
 
 /* Support simple control of power to the device's USB ports */
 #undef CONFIG_USB_PORT_POWER_DUMB