diff --git a/extmod/modujson.c b/extmod/modujson.c
index 6eeba4ed60..f731d71933 100644
--- a/extmod/modujson.c
+++ b/extmod/modujson.c
@@ -34,6 +34,16 @@
 
 #if MICROPY_PY_UJSON
 
+STATIC mp_obj_t mod_ujson_dump(mp_obj_t obj, mp_obj_t stream) {
+    if (!MP_OBJ_IS_OBJ(stream)) {
+        mp_raise_TypeError(NULL);
+    }
+    mp_print_t print = {MP_OBJ_TO_PTR(stream), mp_stream_write_adaptor};
+    mp_obj_print_helper(&print, obj, PRINT_JSON);
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_ujson_dump_obj, mod_ujson_dump);
+
 STATIC mp_obj_t mod_ujson_dumps(mp_obj_t obj) {
     vstr_t vstr;
     mp_print_t print;
@@ -283,6 +293,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_ujson_loads_obj, mod_ujson_loads);
 
 STATIC const mp_rom_map_elem_t mp_module_ujson_globals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ujson) },
+    { MP_ROM_QSTR(MP_QSTR_dump), MP_ROM_PTR(&mod_ujson_dump_obj) },
     { MP_ROM_QSTR(MP_QSTR_dumps), MP_ROM_PTR(&mod_ujson_dumps_obj) },
     { MP_ROM_QSTR(MP_QSTR_load), MP_ROM_PTR(&mod_ujson_load_obj) },
     { MP_ROM_QSTR(MP_QSTR_loads), MP_ROM_PTR(&mod_ujson_loads_obj) },
diff --git a/tests/extmod/ujson_dump.py b/tests/extmod/ujson_dump.py
new file mode 100644
index 0000000000..c80e533ed7
--- /dev/null
+++ b/tests/extmod/ujson_dump.py
@@ -0,0 +1,18 @@
+try:
+    from uio import StringIO
+    import ujson as json
+except:
+    try:
+        from io import StringIO
+        import json
+    except ImportError:
+        print("SKIP")
+        raise SystemExit
+
+s = StringIO()
+json.dump(False, s)
+print(s.getvalue())
+
+s = StringIO()
+json.dump({"a": (2, [3, None])}, s)
+print(s.getvalue())