diff --git a/reference_guide/api_changes_list.md b/reference_guide/api_changes_list.md
index 75625a525..a47008645 100644
--- a/reference_guide/api_changes_list.md
+++ b/reference_guide/api_changes_list.md
@@ -38,6 +38,7 @@ The following problem patterns are supported:
 <class name>.<field name> field type changed from <before> to <after>
 <class name>.<field name> field visibility changed from <before> to <after>
 
+<class name>.<method name>(<human-readable parameters>) marked abstract
 <class name>.<method name>(<human-readable parameters>) abstract method added
 <class name> class moved to package <package name>