diff --git a/fs/partitions/efi.c b/fs/partitions/efi.c
index 46e9f47..9e86a34 100644
--- a/fs/partitions/efi.c
+++ b/fs/partitions/efi.c
@@ -360,6 +360,12 @@ is_gpt_valid(struct block_device *bdev, u64 lba,
 		goto fail;
 	}
 
+	/* Check that sizeof_partition_entry has the correct value */
+	if (le32_to_cpu((*gpt)->sizeof_partition_entry) != sizeof(gpt_entry)) {
+		pr_debug("GUID Partitition Entry Size check failed.\n");
+		goto fail;
+	}
+
 	if (!(*ptes = alloc_read_gpt_entries(bdev, *gpt)))
 		goto fail;