diff --git a/kernel-src/include/kernel/pci.h b/kernel-src/include/kernel/pci.h
index bd0b46e6..0a0fa657 100644
--- a/kernel-src/include/kernel/pci.h
+++ b/kernel-src/include/kernel/pci.h
@@ -13,6 +13,7 @@
 #define PCI_CONFIG_COMMAND 0x4
 	#define PCI_COMMAND_IO 0x1
 	#define PCI_COMMAND_MMIO 0x2
+	#define PCI_COMMAND_BUSMASTER 0x4
 	#define PCI_COMMAND_IRQDISABLE 0x400
 #define PCI_CONFIG_STATUS 0x6
 	#define PCI_STATUS_HASCAP 0x10