diff --git a/conv1to2 b/conv1to2
index defaf0a..563e661 100755
--- a/conv1to2
+++ b/conv1to2
@@ -3,14 +3,26 @@
 IFS=$'\n'
 if [ -z "$1" ]
 then echo rename files in current folder replacing arg1 with arg2.
+     echo '-n for match non ascii, replace with arg2'
      exit
 fi
 
-for file in $( ls | grep "$1" )
+if [ "$1" = "-n" ]
+then for file in $( ls | grep -P "[\x80-\xFF]" )
+   do echo "$file" '->' "$( echo $file | tr -d \\n\\r | tr -c [:print:] '\000' | sed s/'\x0'/"$2"/g )"
+   done
+   echo 'sure?'
+   read i
+   for file in $( ls | grep -P "[\x80-\xFF]" )
+   do mv -iv -- "$file" "$( echo $file | tr -d \\n\\r | tr -c [:print:] '\000' | sed s/'\x0'/"$2"/g )"
+   done
+  exit
+fi
+for file in $( ls | grep -- "$1" )
 do echo "$file" '->' "$( echo $file | sed s/"$1"/"$2"/g )"
 done
 echo 'sure?'
 read i
-for file in $( ls | grep "$1" )
+for file in $( ls | grep -- "$1" )
 do mv -iv -- "$file" "$( echo $file | sed s/"$1"/"$2"/g )"
 done