diff --git a/page.go b/page.go
index 15470544..1c1e4212 100644
--- a/page.go
+++ b/page.go
@@ -568,7 +568,7 @@ func (p *Page) EvalWithOptions(opts *EvalOptions) (*proto.RuntimeRemoteObject, e
 			AwaitPromise:        true,
 			ReturnByValue:       opts.ByValue,
 			UserGesture:         opts.UserGesture,
-			FunctionDeclaration: SprintFnThis(opts.JS),
+			FunctionDeclaration: formatToJSFunc(opts.JS),
 			Arguments:           args,
 		}.Call(p)
 		if opts.ThisID == "" && isNilContextErr(err) {
diff --git a/utils.go b/utils.go
index 77ddea67..282ef23e 100644
--- a/utils.go
+++ b/utils.go
@@ -105,8 +105,7 @@ func jsHelper(name js.Name, args JSArgs) *EvalOptions {
 	}
 }
 
-// SprintFnThis wrap js with this, wrap function call if it's js expression
-func SprintFnThis(js string) string {
+func formatToJSFunc(js string) string {
 	if detectJSFunction(js) {
 		return fmt.Sprintf(`function() { return (%s).apply(this, arguments) }`, js)
 	}