diff --git a/disk/part_efi.c b/disk/part_efi.c
index cc188ee..d8a8111 100644
--- a/disk/part_efi.c
+++ b/disk/part_efi.c
@@ -163,7 +163,9 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
 
 	/* The ulong casting limits the maximum disk size to 2 TB */
 	info->start = (ulong) le64_to_int((*pgpt_pte)[part - 1].starting_lba);
-	info->size = (ulong) le64_to_int((*pgpt_pte)[part - 1].ending_lba) - info->start;
+	/* The ending LBA is inclusive, to calculate size, add 1 to it */
+	info->size = ((ulong)le64_to_int((*pgpt_pte)[part - 1].ending_lba) + 1)
+		     - info->start;
 	info->blksz = GPT_BLOCK_SIZE;
 
 	sprintf((char *)info->name, "%s%d\n", GPT_ENTRY_NAME, part);