diff --git a/src/services/shims.ts b/src/services/shims.ts
index 2157ae2336e..dec48facc35 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -870,7 +870,7 @@ module ts {
         /*
          * Returns script API version.
          */
-        public getApiVersion(dummy: any): string {
+        public getApiVersion(): string {
             return ScriptAPIVersion;
         }