diff --git a/includes/comment.inc b/includes/comment.inc
index 84d46ae..616a83d 100644
--- a/includes/comment.inc
+++ b/includes/comment.inc
@@ -543,6 +543,8 @@ function project_issue_comment_view(&$node, $comment = NULL) {
  *   An object representing the comment data used to update the issue.
  */
 function project_issue_update_by_comment($comment_data, $op) {
+  global $user;
+
   switch ($op) {
     case 'insert':
       // Massage the incoming data so the structure is consistent throughout the function.
@@ -575,9 +577,19 @@ function project_issue_update_by_comment($comment_data, $op) {
   $node = node_load($comment_data->nid, NULL, TRUE);  // Don't use cached since we changed data above.
   $node->title = $comment_data->title;
 
+  // Prevent node revision author from being changed.
+  // @see node_save(), _node_save_revision()
+  $original_user = $user;
+  session_save_session(FALSE);
+  $user = user_load($node->uid);
+
   // This also updates the changed date of the issue.
   node_save($node);
 
+  // Restore original user.
+  $user = $original_user;
+  session_save_session(TRUE);
+
   // Return the object of comment data we used to update the issue.
   return $comment_data;
 }