diff --git a/board/glados/board.h b/board/glados/board.h
index 515daaf9e5..76302791d4 100644
--- a/board/glados/board.h
+++ b/board/glados/board.h
@@ -50,6 +50,7 @@
 #define CONFIG_USB_SWITCH_PI3USB9281
 #define CONFIG_USB_SWITCH_PI3USB9281_CHIP_COUNT 2
 #define CONFIG_USBC_SS_MUX
+#define CONFIG_USBC_VCONN
 #define CONFIG_SCI_GPIO GPIO_PCH_SCI_L
 
 #define CONFIG_SPI_PORT 1
diff --git a/board/oak/board.h b/board/oak/board.h
index 8200c81916..df78eb56bd 100644
--- a/board/oak/board.h
+++ b/board/oak/board.h
@@ -57,6 +57,7 @@
 #define CONFIG_POWER_BUTTON
 #define CONFIG_POWER_COMMON
 #define CONFIG_USBC_SS_MUX
+#define CONFIG_USBC_VCONN
 #define CONFIG_USB_POWER_DELIVERY
 #define CONFIG_USB_PD_ALT_MODE
 #define CONFIG_USB_PD_ALT_MODE_DFP