diff --git a/packages/botkit/src/core.ts b/packages/botkit/src/core.ts
index d9950f21d..3a61ca7d5 100644
--- a/packages/botkit/src/core.ts
+++ b/packages/botkit/src/core.ts
@@ -1090,7 +1090,7 @@ export class Botkit {
         }
 
         let worker: BotWorker = null;
-        const adapter = custom_adapter || (config.context && config.context.adapter) ? config.context.adapter : this.adapter;
+        const adapter = custom_adapter || (config && config.context && config.context.adapter) ? config.context.adapter : this.adapter;
 
         if (adapter.botkit_worker) {
             const CustomBotWorker = adapter.botkit_worker;