diff --git a/src/device/device_util.c b/src/device/device_util.c
index 83decc1188..dc43b9a656 100644
--- a/src/device/device_util.c
+++ b/src/device/device_util.c
@@ -100,7 +100,7 @@ struct device *dev_find_slot_on_smbus(unsigned int bus, unsigned int addr)
  * @param device Logical device number.
  * @return Pointer to the device structure (if found), 0 otherwise.
  */
-struct device *dev_find_slot_pnp(u16 port, u8 device)
+struct device *dev_find_slot_pnp(u16 port, u16 device)
 {
 	struct device *dev;
 
diff --git a/src/include/device/device.h b/src/include/device/device.h
index f05ddea1dd..74bdbd7b40 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -169,7 +169,7 @@ device_t dev_find_device (u16 vendor, u16 device, device_t from);
 device_t dev_find_class (unsigned int class, device_t from);
 device_t dev_find_slot (unsigned int bus, unsigned int devfn);
 device_t dev_find_slot_on_smbus (unsigned int bus, unsigned int addr);
-device_t dev_find_slot_pnp(u16 port, u8 device);
+device_t dev_find_slot_pnp(u16 port, u16 device);
 device_t dev_find_lapic(unsigned apic_id);
 int dev_count_cpu(void);