diff --git a/sys/compat/linuxkpi/common/include/linux/pci.h b/sys/compat/linuxkpi/common/include/linux/pci.h
index cc8dbe2fef1..263dc41377c 100644
--- a/sys/compat/linuxkpi/common/include/linux/pci.h
+++ b/sys/compat/linuxkpi/common/include/linux/pci.h
@@ -112,6 +112,7 @@ MODULE_PNP_INFO("U32:vendor;U32:device;V32:subvendor;V32:subdevice",	\
 #define	PCI_DEVICE_ID		PCIR_DEVICE
 #define	PCI_COMMAND		PCIR_COMMAND
 #define	PCI_COMMAND_INTX_DISABLE	PCIM_CMD_INTxDIS
+#define	PCI_COMMAND_MEMORY	PCIM_CMD_MEMEN
 #define	PCI_EXP_DEVCTL		PCIER_DEVICE_CTL		/* Device Control */
 #define	PCI_EXP_LNKCTL		PCIER_LINK_CTL			/* Link Control */
 #define	PCI_EXP_LNKCTL_ASPM_L0S	PCIEM_LINK_CTL_ASPMC_L0S