diff --git a/sys/dev/pci/pcireg.h b/sys/dev/pci/pcireg.h
index b467a64cc84b..0f6fb28e07d4 100644
--- a/sys/dev/pci/pcireg.h
+++ b/sys/dev/pci/pcireg.h
@@ -74,6 +74,8 @@
 #define PCIR_CARDBUSCIS	0x28
 #define PCIR_SUBVEND_0	0x2c
 #define PCIR_SUBDEV_0	0x2e
+#define PCIR_BIOS	0x30
+#define PCIM_BIOS_ENABLE	0x01
 #define PCIR_INTLINE	0x3c
 #define PCIR_INTPIN	0x3d
 #define PCIR_MINGNT	0x3e
diff --git a/sys/pci/pcireg.h b/sys/pci/pcireg.h
index b467a64cc84b..0f6fb28e07d4 100644
--- a/sys/pci/pcireg.h
+++ b/sys/pci/pcireg.h
@@ -74,6 +74,8 @@
 #define PCIR_CARDBUSCIS	0x28
 #define PCIR_SUBVEND_0	0x2c
 #define PCIR_SUBDEV_0	0x2e
+#define PCIR_BIOS	0x30
+#define PCIM_BIOS_ENABLE	0x01
 #define PCIR_INTLINE	0x3c
 #define PCIR_INTPIN	0x3d
 #define PCIR_MINGNT	0x3e