diff --git a/include/part_efi.h b/include/part_efi.h
index fb402df6f13..7dac8da32e8 100644
--- a/include/part_efi.h
+++ b/include/part_efi.h
@@ -35,6 +35,14 @@
 #define PARTITION_SYSTEM_GUID \
 	EFI_GUID( 0xC12A7328, 0xF81F, 0x11d2, \
 		0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B)
+/*
+ * Extended Boot Loader Partition (XBOOTLDR), defined by the
+ * Boot Loader Specification:
+ * https://uapi-group.org/specifications/specs/boot_loader_specification/
+ */
+#define PARTITION_XBOOTLDR_GUID \
+	EFI_GUID(0xbc13c2ff, 0x59e6, 0x4262, \
+		 0xa3, 0x52, 0xb2, 0x75, 0xfd, 0x6f, 0x71, 0x72)
 #define LEGACY_MBR_PARTITION_GUID \
 	EFI_GUID( 0x024DEE41, 0x33E7, 0x11d3, \
 		0x9D, 0x69, 0x00, 0x08, 0xC7, 0x81, 0xF3, 0x9F)