diff --git a/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php b/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php
--- a/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php
+++ b/src/applications/legalpad/query/LegalpadDocumentSearchEngine.php
@@ -53,7 +53,7 @@
     }
 
     if ($map['contributorPHIDs']) {
-      $query->withContributorPHIDs($map['creatorPHIDs']);
+      $query->withContributorPHIDs($map['contributorPHIDs']);
     }
 
     if ($map['creatorPHIDs']) {