diff --git a/book/doctrine.rst b/book/doctrine.rst
index 0f3f62086d0..0906d7aaab2 100644
--- a/book/doctrine.rst
+++ b/book/doctrine.rst
@@ -641,6 +641,9 @@ to easily fetch objects based on multiple conditions::
 
     If you click the icon, the profiler will open, showing you the exact
     queries that were made.
+    
+    The icon will turn yellow if there were more than 50 queries on the
+    page, this could indicate that something is not correct.
 
 Updating an Object
 ~~~~~~~~~~~~~~~~~~