diff --git a/arch/x86/include/asm/arch-quark/device.h b/arch/x86/include/asm/arch-quark/device.h
index 7882f33..4760aa2 100644
--- a/arch/x86/include/asm/arch-quark/device.h
+++ b/arch/x86/include/asm/arch-quark/device.h
@@ -7,12 +7,17 @@
 #ifndef _QUARK_DEVICE_H_
 #define _QUARK_DEVICE_H_
 
-#include <pci.h>
+/*
+ * Internal PCI device numbers within the SoC.
+ *
+ * Note it must start with 0x_ prefix, as the device number macro will be
+ * included in the ACPI ASL files (see irq_helper.h and irq_route.h).
+ */
 
-#define QUARK_HOST_BRIDGE_DEV	0
+#define QUARK_HOST_BRIDGE_DEV	0x00
 #define QUARK_HOST_BRIDGE_FUNC	0
 
-#define QUARK_DEV_20		20
+#define QUARK_DEV_20		0x14
 #define QUARK_MMC_SDIO_FUNC	0
 #define QUARK_UART0_FUNC	1
 #define QUARK_USB_DEVICE_FUNC	2
@@ -22,18 +27,21 @@
 #define QUARK_EMAC0_FUNC	6
 #define QUARK_EMAC1_FUNC	7
 
-#define QUARK_DEV_21		21
+#define QUARK_DEV_21		0x15
 #define QUARK_SPI0_FUNC		0
 #define QUARK_SPI1_FUNC		1
 #define QUARK_I2C_GPIO_FUNC	2
 
-#define QUARK_DEV_23		23
+#define QUARK_DEV_23		0x17
 #define QUARK_PCIE0_FUNC	0
 #define QUARK_PCIE1_FUNC	1
 
-#define QUARK_LGC_BRIDGE_DEV	31
+#define QUARK_LGC_BRIDGE_DEV	0x1f
 #define QUARK_LGC_BRIDGE_FUNC	0
 
+#ifndef __ASSEMBLY__
+#include <pci.h>
+
 #define QUARK_HOST_BRIDGE	\
 	PCI_BDF(0, QUARK_HOST_BRIDGE_DEV, QUARK_HOST_BRIDGE_FUNC)
 #define QUARK_MMC_SDIO		\
@@ -64,5 +72,6 @@
 	PCI_BDF(0, QUARK_DEV_23, QUARK_PCIE1_FUNC)
 #define QUARK_LEGACY_BRIDGE	\
 	PCI_BDF(0, QUARK_LGC_BRIDGE_DEV, QUARK_LGC_BRIDGE_FUNC)
+#endif /* __ASSEMBLY__ */
 
 #endif /* _QUARK_DEVICE_H_ */