diff --git a/readme.txt b/readme.txt
index cb1428ab..8731c40c 100644
--- a/readme.txt
+++ b/readme.txt
@@ -75,6 +75,7 @@ Improvements:
 - Made types trivially copyable #263
 - Removed <iostream> in GLM tests
 - Used std features within GLM without redeclaring
+- Optimized glm::cot #272
 
 Fixes:
 - Fixed std::nextafter not supported with C++11 on Android #217