diff --git a/docs/guide/warnings.rst b/docs/guide/warnings.rst
index 5f67d1313a8..b70f30210b0 100644
--- a/docs/guide/warnings.rst
+++ b/docs/guide/warnings.rst
@@ -234,6 +234,7 @@ List Of Warnings
 
    3. If the element type of the array is a compound type.
 
+   4. In versions before 5.026, any delayed assignment to an array.
    It might slightly improve run-time performance if you change the
    non-blocking assignment inside the loop into a blocking assignment
    (that is: use '=' instead of '<='), if possible.