diff --git a/client/fix_backuppc_linux_sudo.sh b/client/fix_backuppc_linux_sudo.sh
index 7fb3b4e..46c8c6a 100755
--- a/client/fix_backuppc_linux_sudo.sh
+++ b/client/fix_backuppc_linux_sudo.sh
@@ -69,6 +69,21 @@ is_backup_sudoers_line()
 	fi
 }
 ## ]]]
+## Add some configuration to the main sudoers conf  [[[
+add_sudoers_conf()
+{
+	sudoers_conf="${1}"
+	sudoers_file="/etc/sudoers"
+
+	## Set sudoers configuration for BackupPC
+	cat << EOF >> "${sudoers_file}"
+# Added by a script
+${sudoers_conf}
+EOF
+
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Function add_sudoers_conf() — ${sudoers_file} was modified."
+}
+## ]]]
 ## Add some configuration to a specific file under sudoers.d/  [[[
 add_backup_sudoers_conf()
 {
@@ -103,7 +118,21 @@ fi
 is_backup_user "${BACKUP_USER_LIST}"
 
 # Ensure sudoers.d is include in the sudoers main configuration
-is_sudoers_line "${SUDOERS_D_INCLUDE_LINE}"
+if ! is_sudoers_line "${SUDOERS_D_INCLUDE_LINE}"
+then
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : First try — ${SUDOERS_D_INCLUDE_LINE} was not found in sudo main configuration."
+	## Add the expected line
+	add_sudoers_conf "${SUDOERS_D_INCLUDE_LINE}"
+
+	## Test again if the line is now available
+	if ! is_sudoers_line "${SUDOERS_D_INCLUDE_LINE}"
+	then
+		[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Second try — ${SUDOERS_D_INCLUDE_LINE} was not found in sudo main configuration."
+		printf '\e[1;31m%-6s\e[m\n' "ERROR : The sudo configuration was not successfully modified."
+		printf '\e[1;31m%-6s\e[m\n' "ERROR : Please contact your administrator."
+		exit "${ERROR}"
+	fi
+fi
 
 # Test if sudoers conf is already set
 if ! is_backup_sudoers_line "${BACKUP_SUDOERS_LINE_REGEXP}"