diff -u -r linux/fs/reiserfs/super.c linux-patched/fs/reiserfs/super.c
--- linux/fs/reiserfs/super.c	Mon Jan 28 18:10:37 2002
+++ linux-patched/fs/reiserfs/super.c	Mon Jan 28 18:05:20 2002
@@ -1066,6 +1066,7 @@
 	    /* and -o conv is given */ 
 	    reiserfs_warning ("reiserfs: converting 3.5 filesystem to the 3.6 format\n") ;
 	    
+	    if (is_reiserfs_3_5 (rs))
 	      /* put magic string of 3.6 format. 2.2 will not be able to
 		 mount this filesystem anymore */
 	      memcpy (rs->s_v1.s_magic, reiserfs_3_6_magic_string, 

.