diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62e2973e76..1fd53ca84b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@
 
 Changes:
 
+- Adjust historic `WinningData` and `SlotRange` types (36-entry variant)
+- Emit `decorated` event on API on metadata decoration
 - Dedupe and extend `WrapperKeepOpaque/WrapperOpaque`
 - Align `Range/RangeInclusive` usage with similar types
 
diff --git a/packages/api/src/base/Decorate.ts b/packages/api/src/base/Decorate.ts
index 33fb00fee4..8cb4cfe800 100644
--- a/packages/api/src/base/Decorate.ts
+++ b/packages/api/src/base/Decorate.ts
@@ -275,6 +275,8 @@ export abstract class Decorate<ApiType extends ApiTypes> extends Events {
     }
 
     augmentObject(null, decoratedMeta.consts, this._rx.consts, fromEmpty);
+
+    this.emit('decorated');
   }
 
   /**
diff --git a/packages/api/src/types/index.ts b/packages/api/src/types/index.ts
index 3b9ce38478..db653fb9b9 100644
--- a/packages/api/src/types/index.ts
+++ b/packages/api/src/types/index.ts
@@ -81,7 +81,7 @@ export interface ApiOptions extends RegisteredTypes {
   throwOnUnknown?: boolean;
 }
 
-export type ApiInterfaceEvents = ProviderInterfaceEmitted | 'ready';
+export type ApiInterfaceEvents = ProviderInterfaceEmitted | 'ready' | 'decorated';
 
 export interface SignerOptions extends SignatureOptions {
   blockNumber: BN;