diff --git a/dynamic_programming/longest_increasing_subsequence.py b/dynamic_programming/longest_increasing_subsequence.py
index d839757f6da5..d349fe3ce37a 100644
--- a/dynamic_programming/longest_increasing_subsequence.py
+++ b/dynamic_programming/longest_increasing_subsequence.py
@@ -11,6 +11,12 @@
 Example:
     ``[10, 22, 9, 33, 21, 50, 41, 60, 80]`` as input will return
     ``[10, 22, 33, 41, 60, 80]`` as output
+
+Sorry, this doesn't work for this counter-example:
+    ``[28, 26, 12, 23, 35, 39]`` as input will return
+    ``[26, 35, 39]`` as output
+    instead of
+    ``[12, 23, 35, 39]`` as output
 """
 
 from __future__ import annotations