diff --git a/patterns/fs/ext4.hexpat b/patterns/fs/ext4.hexpat
index 3e891a9..0cd8578 100644
--- a/patterns/fs/ext4.hexpat
+++ b/patterns/fs/ext4.hexpat
@@ -540,4 +540,4 @@ struct ext4_group_descriptors {
     }
 };
 
-ext4_group_descriptors group_descs @ block_to_address(2);
\ No newline at end of file
+ext4_group_descriptors group_descs @ block_to_address(super_block.s_first_data_block + 1);