diff --git a/CHANGES/v2.1.txt b/CHANGES/v2.1.txt
index 5464148d83f5a08f567e66f86d36f25eb8e88f96..b3c47a3894be6f76b3c0ccb1166b55fc411bfcb6 100644
--- a/CHANGES/v2.1.txt
+++ b/CHANGES/v2.1.txt
@@ -246,6 +246,7 @@ Unreleased changes (will be included in 2.1.5)
 
 For users:
 - PLUMED now reports an error when using \ref HISTOGRAM with FREE-ENERGY without USE_ALL_DATA. See \issue{175}
+- Fixed a bug in configure together with --enable-almost. The check for lbz2 library was not working properly.
 
 See branch \branch{v2.1} on git repository.