diff --git a/CHANGELOG b/CHANGELOG
index f5d3a527687577cff1cda20877e442fcd82b6fac..1cf1bb5c59ef95d7bb552d0d5ac4e8ac1fe26e01 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,8 @@ minerva (14.0.0~alpha.1) unstable; urgency=low
     submodel id (#860)
   * Bug fix: Empty Overlay colours were not preserved during export to
     CellDesigner (#714)
+  * Bug fix: some project couldn't be accessed due to problem with migration of 
+    reaction with unknown boolean operator (#880)
 
  -- Piotr Gawron <piotr.gawron@uni.lu>  Mon, 12 Aug 2019 10:00:00 +0200