diff --git a/ChangeLog b/ChangeLog
index 047e03e76..819994f1e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -30,6 +30,9 @@ FlexibleSUSY-1.5.0 [June, 29 2016]
    correction, the running 1st and 2nd generation SM(5) fermion masses
    differ from SOFTSUSY by less than 0.5% at the electroweak scale.
 
+ * Bugfix (commit 63f5361): Fix numerical instability of SOFTSUSY's B1
+   funcion in parameter regions with p << m1,m2 and m1 close to m2.
+
 FlexibleSUSY-1.4.2 [May, 09 2016]
 
  * Bugfix: Correcting handling of spaces in configure script if