diff --git a/include/efi_api.h b/include/efi_api.h
index 2d18d25..c57868a 100644
--- a/include/efi_api.h
+++ b/include/efi_api.h
@@ -570,6 +570,7 @@
 #define DEVICE_PATH_TYPE_HARDWARE_DEVICE	0x01
 #  define DEVICE_PATH_SUB_TYPE_MEMORY		0x03
 #  define DEVICE_PATH_SUB_TYPE_VENDOR		0x04
+#  define DEVICE_PATH_SUB_TYPE_CONTROLLER	0x05
 
 struct efi_device_path_memory {
 	struct efi_device_path dp;
@@ -584,6 +585,11 @@
 	u8 vendor_data[];
 } __packed;
 
+struct efi_device_path_controller {
+	struct efi_device_path dp;
+	u32 controller_number;
+} __packed;
+
 #define DEVICE_PATH_TYPE_ACPI_DEVICE		0x02
 #  define DEVICE_PATH_SUB_TYPE_ACPI_DEVICE	0x01