diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 34c4ad5062a..b5df2b5af20 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -165,7 +165,7 @@ namespace ts.SignatureHelp {
 
     const emptyArray: any[] = [];
 
-    const enum ArgumentListKind {
+    export const enum ArgumentListKind {
         TypeArguments,
         CallArguments,
         TaggedTemplateArguments