diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -91,7 +91,7 @@
 MODULE_PNP_INFO("U32:vendor;U32:device;V32:subvendor;V32:subdevice",	\
     _bus, lkpi_ ## _table, _table, nitems(_table) - 1)
 
-#define	PCI_ANY_ID			-1U
+#define	PCI_ANY_ID			((uint16_t)-1U)
 
 #define PCI_DEVFN(slot, func)   ((((slot) & 0x1f) << 3) | ((func) & 0x07))
 #define PCI_SLOT(devfn)		(((devfn) >> 3) & 0x1f)