diff --git a/library/Icinga/Data/Filter/Filter.php b/library/Icinga/Data/Filter/Filter.php
index 8a063ee2a6..866d161b83 100644
--- a/library/Icinga/Data/Filter/Filter.php
+++ b/library/Icinga/Data/Filter/Filter.php
@@ -132,7 +132,7 @@ public static function where($col, $filter)
     public static function expression($col, $op, $expression)
     {
         $col = trim($col);
-        $expression = trim($expression);
+        $expression = is_array($expression) ? array_map('trim', $expression) : trim($expression);
         switch ($op) {
             case '=': return new FilterMatch($col, $op, $expression);
             case '<': return new FilterLessThan($col, $op, $expression);
diff --git a/test/php/library/Icinga/Data/Filter/FilterTest.php b/test/php/library/Icinga/Data/Filter/FilterTest.php
index b8f9ea78a9..7d63492137 100644
--- a/test/php/library/Icinga/Data/Filter/FilterTest.php
+++ b/test/php/library/Icinga/Data/Filter/FilterTest.php
@@ -204,9 +204,11 @@ public function testLeadingAndTrailingWhitespacesSanitizing()
         $columnHasWhitespaces = Filter::where(' host ', 'localhost');
         $expressionHasWhitespaces = Filter::where('host', ' localhost ');
         $bothHaveWhitespaces = Filter::fromQueryString('  host  =  localhost  ');
+        $withArray = Filter::where(' host ', array(' no match  ', '  localhost  '));
         $this->assertTrue($columnHasWhitespaces->matches($this->sampleData[0]));
         $this->assertTrue($expressionHasWhitespaces->matches($this->sampleData[0]));
         $this->assertTrue($bothHaveWhitespaces->matches($this->sampleData[0]));
+        $this->assertTrue($withArray->matches($this->sampleData[0]));
     }
 
     private function row($idx)