diff --git a/mainboard/emulation/qemu-x86/Kconfig b/mainboard/emulation/qemu-x86/Kconfig
index f52066f6ae..aaf3547812 100644
--- a/mainboard/emulation/qemu-x86/Kconfig
+++ b/mainboard/emulation/qemu-x86/Kconfig
@@ -6,14 +6,14 @@ config MAINBOARD_NAME
 	  This is the default mainboard name.
 
 config MAINBOARD_PCI_SUBSYSTEM_VENDOR_ID
-	int
+	hex
 	default 0x15ad
 	depends BOARD_EMULATION_QEMU_X86
 	help
 	  Mainboard specific PCI subsystem vendor ID.
 
 config MAINBOARD_PCI_SUBSYSTEM_DEVICE_ID
-	int
+	hex
 	default 0x1976
 	depends BOARD_EMULATION_QEMU_X86
 	help