diff --git a/packages/extension-api/src/extension-api.d.ts b/packages/extension-api/src/extension-api.d.ts
index 8d974b4761b..accc13633f0 100644
--- a/packages/extension-api/src/extension-api.d.ts
+++ b/packages/extension-api/src/extension-api.d.ts
@@ -778,7 +778,7 @@ declare module '@podman-desktop/api' {
     onCancellationRequested: Event<any>;
   }
 
-  export interface CancellationTokenSource {
+  export class CancellationTokenSource {
     /**
      * The cancellation token of this source.
      */