diff --git a/helpers/getopts b/helpers/getopts
index e912220e4..f9ef5dc0b 100644
--- a/helpers/getopts
+++ b/helpers/getopts
@@ -77,9 +77,9 @@ ynh_handle_getopts_args() {
                 # And replace long option (value of the option_flag) by the short option, the option_flag itself
                 # (e.g. for [u]=user, --user will be -u)
                 # Replace long option with = (match the beginning of the argument)
-                arguments[arg]="$(echo "${arguments[arg]}" | sed "s/^--${args_array[$option_flag]}/-${option_flag} /")"
+                arguments[arg]="$(printf '%s\n' "${arguments[arg]}" | sed "s/^--${args_array[$option_flag]}/-${option_flag} /")"
                 # And long option without = (match the whole line)
-                arguments[arg]="$(echo "${arguments[arg]}" | sed "s/^--${args_array[$option_flag]%=}$/-${option_flag} /")"
+                arguments[arg]="$(printf '%s\n' "${arguments[arg]}" | sed "s/^--${args_array[$option_flag]%=}$/-${option_flag} /")"
             done
         done