diff --git a/source/md5tofile b/source/md5tofile
index d6205a2d..28706313 100755
--- a/source/md5tofile
+++ b/source/md5tofile
@@ -3,7 +3,7 @@ if [ $# -ne 1 ] ; then
         echo "Usage $0 [directory]" 
         exit 1
 fi
-find $1 -type f  -print0 | while IFS= read -r -d $'\0' file; do
+find $1 -type f -iname "*.txz" -print0 | while IFS= read -r -d $'\0' file; do
     (
     cd "$(dirname "$file")"
     filename="$(basename "$file")"