diff --git a/dlls/jscript/array.c b/dlls/jscript/array.c
index 944c0e86b79..9d7c8d843ad 100644
--- a/dlls/jscript/array.c
+++ b/dlls/jscript/array.c
@@ -279,11 +279,18 @@ static HRESULT Array_splice(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAM
     return E_NOTIMPL;
 }
 
+/* ECMA-262 3rd Edition    15.4.4.2 */
 static HRESULT Array_toString(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    TRACE("\n");
+
+    if(!is_class(dispex, JSCLASS_ARRAY)) {
+        WARN("not Array object\n");
+        return E_FAIL;
+    }
+
+    return array_join(dispex, lcid, ((ArrayInstance*)dispex)->length, default_separatorW, retv, ei, sp);
 }
 
 static HRESULT Array_toLocaleString(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
diff --git a/dlls/jscript/tests/api.js b/dlls/jscript/tests/api.js
index f331670acab..78c0425aebe 100644
--- a/dlls/jscript/tests/api.js
+++ b/dlls/jscript/tests/api.js
@@ -79,4 +79,9 @@ ok(tmp === "1;2;;false;;;a", "arr.join(';') = " + tmp);
 tmp = arr.join("");
 ok(tmp === "12falsea", "arr.join('') = " + tmp);
 
+tmp = arr.toString();
+ok(tmp === "1,2,,false,,,a", "arr.toString() = " + tmp);
+tmp = arr.toString("test");
+ok(tmp === "1,2,,false,,,a", "arr.toString() = " + tmp);
+
 reportSuccess();