diff --git a/src/alpaca/exchange.ts b/src/alpaca/exchange.ts
index 70269f3..2d701d0 100644
--- a/src/alpaca/exchange.ts
+++ b/src/alpaca/exchange.ts
@@ -4,6 +4,7 @@ import { AlpacaQuoteProvider } from './quote';
 import { Exchange } from '../interface/exchange';
 import { PortfolioProvider } from '../interface/portfolio';
 import { QuoteProvider } from '../interface/quote';
+import { ActionProvider } from '../interface/actions';
 
 /**
  * Exchange implementation for Alpaca.
@@ -24,6 +25,11 @@ export class AlpacaExchange implements Exchange {
      */
     readonly quoteProvider: QuoteProvider;
 
+    /**
+     * The action provider for the exchange.
+     */
+    readonly actionProvider: ActionProvider;
+
     /**
      * The name of the exchange.
      */
@@ -45,6 +51,7 @@ export class AlpacaExchange implements Exchange {
 
         this.portfolioProvider = new AlpacaPortfolioProvider(this.alpaca);
         this.quoteProvider = new AlpacaQuoteProvider(this.alpaca);
+        this.actionProvider = undefined!;
 
         this.name = 'Alpaca';
     }