diff --git a/src/types.d.ts b/src/types.d.ts
index 3a3ce03..3fe6451 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -6,6 +6,8 @@ declare module 'istanbul-lib-instrument' {
   }
 
   export function createInstrumenter(opts: {
+    coverageGlobalScopeFunc?: boolean,
+    coverageGlobalScope?: string;
     preserveComments?: boolean,
     produceSourceMap?: boolean,
     autoWrap?: boolean,