diff --git a/src/Model/Profile.php b/src/Model/Profile.php
index 80775c9e86..147c1f3cab 100644
--- a/src/Model/Profile.php
+++ b/src/Model/Profile.php
@@ -35,6 +35,7 @@ use Friendica\Core\System;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
 use Friendica\DI;
+use Friendica\Network\HTTPException;
 use Friendica\Protocol\Activity;
 use Friendica\Protocol\Diaspora;
 use Friendica\Util\DateTimeFormat;
@@ -204,11 +205,13 @@ class Profile
 	 *      the theme is chosen before the _init() function of a theme is run, which will usually
 	 *      load a lot of theme-specific content
 	 *
-	 * @param App     $a
-	 * @param string  $nickname string
-	 *
+	 * @param App    $a
+	 * @param string $nickname string
+	 * @param bool   $show_contacts
 	 * @return array Profile
-	 * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+	 *
+	 * @throws HTTPException\NotFoundException
+	 * @throws HTTPException\InternalServerErrorException
 	 * @throws \ImagickException
 	 */
 	public static function load(App $a, string $nickname, bool $show_contacts = true)
@@ -219,6 +222,12 @@ class Profile
 			return [];
 		}
 
+		// System user, aborting
+		if ($profile['uid'] === 0) {
+			DI::logger()->warning('System user found in Profile::load', ['nickname' => $nickname, 'callstack' => System::callstack(20)]);
+			throw new HTTPException\NotFoundException(DI::l10n()->t('User not found.'));
+		}
+
 		$a->setProfileOwner($profile['uid']);
 
 		DI::page()['title'] = $profile['name'] . ' @ ' . DI::config()->get('config', 'sitename');