diff --git a/op/op.Search.php b/op/op.Search.php
index afe08e36c..db8cdeaab 100644
--- a/op/op.Search.php
+++ b/op/op.Search.php
@@ -215,7 +215,8 @@ if (isset($_GET["expired"])){
 $categories = array();
 if(isset($_GET['categoryids']) && $_GET['categoryids']) {
 	foreach($_GET['categoryids'] as $catid) {
-		$categories[] = $dms->getDocumentCategory($catid);
+		if($catid > 0)
+			$categories[] = $dms->getDocumentCategory($catid);
 	}
 }