diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d5482f1..f6b50c85 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic
 Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fix bus information queries being performed for the wrong bus index. This
+  fixes VST3 sidechaining in _Renoise_, and prevents a number of VST3 plugins
+  with a sidechain input from causing _Ardour_ and _Mixbus_ to freeze.
+
 ## [3.0.1] - 2020-02-26
 
 ### Changed
diff --git a/src/common/serialization/vst3/plugin/component.h b/src/common/serialization/vst3/plugin/component.h
index 2d2315e9..a6a5f121 100644
--- a/src/common/serialization/vst3/plugin/component.h
+++ b/src/common/serialization/vst3/plugin/component.h
@@ -175,6 +175,7 @@ class YaComponent : public Steinberg::Vst::IComponent {
             s.value8b(instance_id);
             s.value4b(type);
             s.value4b(dir);
+            s.value4b(index);
         }
     };