diff --git a/payloads/libpayload/drivers/pci.c b/payloads/libpayload/drivers/pci.c
index fc1940afbc..be92613e88 100644
--- a/payloads/libpayload/drivers/pci.c
+++ b/payloads/libpayload/drivers/pci.c
@@ -112,3 +112,11 @@ u32 pci_read_resource(pcidev_t dev, int bar)
 {
 	return pci_read_config32(dev, 0x10 + (bar * 4));
 }
+
+void pci_set_bus_master(pcidev_t dev)
+{
+	u16 val = pci_read_config16(dev, REG_COMMAND);
+	val |= REG_COMMAND_BM;
+	pci_write_config16(dev, REG_COMMAND, val);
+}
+
diff --git a/payloads/libpayload/include/pci.h b/payloads/libpayload/include/pci.h
index 1b51f8cd78..93d1267ef5 100644
--- a/payloads/libpayload/include/pci.h
+++ b/payloads/libpayload/include/pci.h
@@ -35,10 +35,12 @@
 typedef u32 pcidev_t;
 
 #define REG_VENDOR_ID   0x00
-#define REG_DEVICE_ID   0x04
+#define REG_COMMAND     0x04
 #define REG_HEADER_TYPE 0x0E
 #define REG_PRIMARY_BUS 0x18
 
+#define REG_COMMAND_BM  (1 << 2)
+
 #define HEADER_TYPE_NORMAL  0
 #define HEADER_TYPE_BRIDGE  1
 #define HEADER_TYPE_CARDBUS 2
@@ -64,4 +66,6 @@ void pci_write_config32(u32 device, u16 reg, u32 val);
 int pci_find_device(u16 vid, u16 did, pcidev_t *dev);
 u32 pci_read_resource(pcidev_t dev, int bar);
 
+void pci_set_bus_master(pcidev_t dev);
+
 #endif