diff --git a/backup.nix b/backup.nix
index 3e22687..615c801 100644
--- a/backup.nix
+++ b/backup.nix
@@ -112,7 +112,7 @@ in {
         invocationId="$(systemctl show --value -p InvocationID misskey-backup.service)"
         logs="$(journalctl _SYSTEMD_INVOCATION_ID="$invocationId" -u misskey-backup.service)"
 
-        if [ "$SERVICE_RESULT" = "success"]; then
+        if [ "$SERVICE_RESULT" = "success" ]; then
           ${notifyEmailPkg}/bin/notify-email "backup" "SUCCESS: Misskey Backup Notification" "$(cat <<EOMSG
         A backup process has succeeded. Logs to follow: