diff --git a/winsup/cygwin/release/2.5.3 b/winsup/cygwin/release/2.5.3
index 0d6f34e68..4a1058c32 100644
--- a/winsup/cygwin/release/2.5.3
+++ b/winsup/cygwin/release/2.5.3
@@ -24,3 +24,6 @@ Bug Fixes
 
 - Fix transposing invalid chars in Windows filenames on relative paths.
   Addresses: https://cygwin.com/ml/cygwin/2016-07/msg00193.html
+
+- Fix truncl which was usding the wrong FPU rounding mode.
+  Addresses: https://rt.perl.org/Public/Bug/Display.html?id=128665