diff --git a/frappe/templates/includes/comments/comments.html b/frappe/templates/includes/comments/comments.html
index 1e3a3734a0..de94c4a867 100644
--- a/frappe/templates/includes/comments/comments.html
+++ b/frappe/templates/includes/comments/comments.html
@@ -65,8 +65,13 @@
 			$(this).toggle(false);
 			$("#comment-form").toggle();
 
-			$("[name='comment_by']").val(getCookie("user_id") || "");
-			$("[name='comment_by_fullname']").val(getCookie("full_name") || "");
+            var full_name = "", user_id = "";
+            if(frappe.is_user_logged_in()) {
+                full_name = getCookie("full_name");
+                user_id = getCookie("user_id");
+            }
+			$("[name='comment_by']").val(user_id);
+			$("[name='comment_by_fullname']").val(full_name);
 			$("#comment-form textarea").val("");
 		})
 		$("#submit-comment").click(function() {