diff --git a/src/Models/SearchServices/PostSearchService.php b/src/Models/SearchServices/PostSearchService.php
index a20ffcb7..d5e2c0d0 100644
--- a/src/Models/SearchServices/PostSearchService.php
+++ b/src/Models/SearchServices/PostSearchService.php
@@ -11,9 +11,10 @@ class PostSearchService extends AbstractSearchService
 	protected static function filterUserSafety(SqlQuery $sqlQuery)
 	{
 		$allowedSafety = PrivilegesHelper::getAllowedSafety();
-		$sqlQuery->raw('safety')->in()->genSlots($allowedSafety);
-		foreach ($allowedSafety as $s)
-			$sqlQuery->put($s);
+		if (empty($allowedSafety))
+			$sqlQuery->raw('0');
+		else
+			$sqlQuery->raw('safety')->in()->genSlots($allowedSafety)->put($allowedSafety);
 	}
 
 	protected static function filterUserHidden(SqlQuery $sqlQuery)
@@ -55,7 +56,10 @@ class PostSearchService extends AbstractSearchService
 	{
 		$ids = preg_split('/[;,]/', $val);
 		$ids = array_map('intval', $ids);
-		$sqlQuery->raw('id')->in()->genSlots($ids)->put($ids);
+		if (empty($ids))
+			$sqlQuery->raw('0');
+		else
+			$sqlQuery->raw('id')->in()->genSlots($ids)->put($ids);
 	}
 
 	protected static function filterTokenIdMin($searchContext, SqlQuery $sqlQuery, $val)
diff --git a/src/Models/SearchServices/TagSearchService.php b/src/Models/SearchServices/TagSearchService.php
index d0aa588d..9035bb2c 100644
--- a/src/Models/SearchServices/TagSearchService.php
+++ b/src/Models/SearchServices/TagSearchService.php
@@ -12,8 +12,11 @@ class TagSearchService extends AbstractSearchService
 			->innerJoin('post_tag')
 			->on('tag.id = post_tag.tag_id')
 			->innerJoin('post')
-			->on('post.id = post_tag.post_id')
-			->where('safety')->in()->genSlots($allowedSafety);
+			->on('post.id = post_tag.post_id');
+		if (empty($allowedSafety))
+			$sqlQuery->where('0');
+		else
+			$sqlQuery->where('safety')->in()->genSlots($allowedSafety);
 		foreach ($allowedSafety as $s)
 			$sqlQuery->put($s);