diff --git a/src/include/device/pci_def.h b/src/include/device/pci_def.h
index ef3427b..e11470c 100644
--- a/src/include/device/pci_def.h
+++ b/src/include/device/pci_def.h
@@ -479,7 +479,7 @@
  *	7:3 = slot
  *	2:0 = function
  */
-#define PCI_DEVFN(slot,func)	((((slot) & 0x1f) << 3) | ((func) & 0x07))
+#define PCI_DEVFN(slot, func)	((((slot) & 0x1f) << 3) | ((func) & 0x07))
 #define PCI_SLOT(devfn)		(((devfn) >> 3) & 0x1f)
 #define PCI_FUNC(devfn)		((devfn) & 0x07)