diff --git a/helpers/backup b/helpers/backup
index 3dee33de0..ade3ce5e5 100644
--- a/helpers/backup
+++ b/helpers/backup
@@ -329,7 +329,7 @@ ynh_store_file_checksum() {
 
     if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
         # Using a base64 is in fact more reversible than "replace / and space by _" ... So we can in fact obtain the original file path in an easy reliable way ...
-        local file_path_base64=$(echo "$file" | base64)
+        local file_path_base64=$(echo "$file" | base64 -w0)
         mkdir -p /var/cache/yunohost/appconfbackup/
         cat $file > /var/cache/yunohost/appconfbackup/original_${file_path_base64}
     fi
@@ -375,7 +375,7 @@ ynh_backup_if_checksum_is_different() {
             ynh_print_warn "File $file has been manually modified since the installation or last upgrade. So it has been duplicated in $backup_file_checksum"
             echo "$backup_file_checksum" # Return the name of the backup file
             if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
-                local file_path_base64=$(echo "$file" | base64)
+                local file_path_base64=$(echo "$file" | base64 -w0)
                 if test -e /var/cache/yunohost/appconfbackup/original_${file_path_base64}
                 then
                     ynh_print_warn "Diff with the original file:"