diff --git a/package.json b/package.json
index f922d693..e8e90f6f 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
   "private": true,
   "main": "index.js",
   "scripts": {
-    "prepare": "npm run buildtool && npm link antlr4ts-cli && npm run antlr4ts && npm run tsc && npm link target/src && npm run buildrts",
+    "prepare": "npm run buildtool && npm link antlr4ts-cli && npm run antlr4ts && npm run tsc && npm link ./target/src && npm run buildrts",
     "unlink": "npm unlink antlr4ts && npm unlink target/src && npm unlink antlr4ts-cli && npm run unlinkruntime && npm run unlinktool",
     "unlinkruntime": "cd target/src && npm unlink",
     "buildtool": "cd tool && npm link -force",
diff --git a/tool/resources/org/antlr/v4/tool/templates/codegen/TypeScript/TypeScript.stg b/tool/resources/org/antlr/v4/tool/templates/codegen/TypeScript/TypeScript.stg
index aded57fc..b3606a1e 100644
--- a/tool/resources/org/antlr/v4/tool/templates/codegen/TypeScript/TypeScript.stg
+++ b/tool/resources/org/antlr/v4/tool/templates/codegen/TypeScript/TypeScript.stg
@@ -82,7 +82,7 @@ export interface <file.grammarName>Listener extends ParseTreeListener {
 <endif>
  * @param ctx the parse tree
  */
-enter<lname; format="cap">?: (ctx: <lname; format="cap">Context) => void;
+enter<lname; format="cap">?(ctx: <lname; format="cap">Context): void;
 /**
 <if(file.listenerLabelRuleNames.(lname))>
  * Exit a parse tree produced by the `<lname>`
@@ -92,7 +92,7 @@ enter<lname; format="cap">?: (ctx: <lname; format="cap">Context) => void;
 <endif>
  * @param ctx the parse tree
  */
-exit<lname; format="cap">?: (ctx: <lname; format="cap">Context) => void;}; separator="\n">
+exit<lname; format="cap">?(ctx: <lname; format="cap">Context): void;}; separator="\n">
 }
 
 <namedActions.afterListener>
@@ -128,7 +128,7 @@ export interface <file.grammarName>Visitor\<Result> extends ParseTreeVisitor\<Re
  * @param ctx the parse tree
  * @return the visitor result
  */
-visit<lname; format="cap">?: (ctx: <lname; format="cap">Context) => Result;}; separator="\n">
+visit<lname; format="cap">?(ctx: <lname; format="cap">Context): Result;}; separator="\n">
 }
 
 <namedActions.afterVisitor>