diff --git a/yargs/index.d.ts b/yargs/index.d.ts
index 7fda2c8320..df84b8dc3d 100644
--- a/yargs/index.d.ts
+++ b/yargs/index.d.ts
@@ -16,6 +16,8 @@ declare namespace yargs {
 
         detectLocale(detect: boolean): Argv;
 
+        terminalWidth(): number;
+
         alias(shortName: string, longName: string): Argv;
         alias(aliases: { [shortName: string]: string }): Argv;
         alias(aliases: { [shortName: string]: string[] }): Argv;
diff --git a/yargs/yargs-tests.ts b/yargs/yargs-tests.ts
index c31ce4b997..e2fedd7b66 100644
--- a/yargs/yargs-tests.ts
+++ b/yargs/yargs-tests.ts
@@ -270,6 +270,14 @@ function Argv$version() {
 		.version(function () { return '1.0.0'; }, '--version', 'description');
 }
 
+function Argv$wrap() {
+	var argv1 = yargs
+		.wrap(null);
+
+	var argv2 = yargs
+		.wrap(yargs.terminalWidth());
+}
+
 function Argv$locale() {
 	var argv = yargs
 		.usage('./$0 - follow ye instructions true')