diff --git a/karma/karma.d.ts b/karma/karma.d.ts
index 25bd114d2..cad9eb6ba 100644
--- a/karma/karma.d.ts
+++ b/karma/karma.d.ts
@@ -49,7 +49,7 @@ declare module 'karma' {
         }
 
         interface DeprecatedServer {
-            start(options?: Config, callback?: ServerCallback): void;
+            start(options?: any, callback?: ServerCallback): void;
         }
 
         interface Runner {