diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
index ba83534..32c7517 100644
--- a/lib/ext2fs/ext2fs.h
+++ b/lib/ext2fs/ext2fs.h
@@ -250,10 +250,17 @@ struct struct_ext2_filsys {
 	int				cluster_ratio_bits;
 	__u16				default_bitmap_type;
 	__u16				pad;
+
+	/*
+	 * RedHat specific change to prevent ABI change by using 8
+	 * reserved bytes
+	 */
+	const struct ext2fs_nls_table *encoding;
+
 	/*
 	 * Reserved for future expansion
 	 */
-	__u32				reserved[5];
+	__u32				reserved[5 - (sizeof(long int)/4)];
 
 	/*
 	 * Reserved for the use of the calling application.
@@ -304,8 +311,6 @@ struct struct_ext2_filsys {
 
 	/* hashmap for SHA of data blocks */
 	struct ext2fs_hashmap* block_sha_map;
-
-	const struct ext2fs_nls_table *encoding;
 };
 
 #if EXT2_FLAT_INCLUDES