diff --git a/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php b/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php
--- a/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php
+++ b/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php
@@ -85,22 +85,23 @@
 
     $xactions = $xaction_query->executeWithCursorPager($pager);
 
+    $comment_map = array();
     if ($xactions) {
       $template = head($xactions)->getApplicationTransactionCommentObject();
+      if ($template) {
 
-      $query = new PhabricatorApplicationTransactionTemplatedCommentQuery();
+        $query = new PhabricatorApplicationTransactionTemplatedCommentQuery();
 
-      $comment_map = $query
-        ->setViewer($viewer)
-        ->setTemplate($template)
-        ->withTransactionPHIDs(mpull($xactions, 'getPHID'))
-        ->execute();
-
-      $comment_map = msort($comment_map, 'getCommentVersion');
-      $comment_map = array_reverse($comment_map);
-      $comment_map = mgroup($comment_map, 'getTransactionPHID');
-    } else {
-      $comment_map = array();
+        $comment_map = $query
+          ->setViewer($viewer)
+          ->setTemplate($template)
+          ->withTransactionPHIDs(mpull($xactions, 'getPHID'))
+          ->execute();
+
+        $comment_map = msort($comment_map, 'getCommentVersion');
+        $comment_map = array_reverse($comment_map);
+        $comment_map = mgroup($comment_map, 'getTransactionPHID');
+      }
     }
 
     $modular_classes = array();