diff --git a/CHANGES/v2.1.txt b/CHANGES/v2.1.txt
index bb73485e2b2438d1ddfec5ee0147f0f5051ea686..f6a90c05c6e28d6af8fbd24bbdba3a23931aa3f8 100644
--- a/CHANGES/v2.1.txt
+++ b/CHANGES/v2.1.txt
@@ -132,6 +132,6 @@ This release will include all the fixes available in branch 2.0.
 
 For users:
 - Small fixes in documentation.
-
+- CS2Backbone: fixed a bug that resulted in only a fraction of the chemical shifts being printed with WRITE_CS and parallel simulations
 
 */