diff --git a/mypy_extensions.py b/mypy_extensions.py
index 891766b..8002360 100644
--- a/mypy_extensions.py
+++ b/mypy_extensions.py
@@ -220,6 +220,34 @@ def __new__(cls, x=0, base=_sentinel):
         return int(x)
 
 
+class i8(metaclass=_NativeIntMeta):
+    def __new__(cls, x=0, base=_sentinel):
+        if base is not _sentinel:
+            return int(x, base)
+        return int(x)
+
+
+class u64(metaclass=_NativeIntMeta):
+    def __new__(cls, x=0, base=_sentinel):
+        if base is not _sentinel:
+            return int(x, base)
+        return int(x)
+
+
+class u32(metaclass=_NativeIntMeta):
+    def __new__(cls, x=0, base=_sentinel):
+        if base is not _sentinel:
+            return int(x, base)
+        return int(x)
+
+
+class u16(metaclass=_NativeIntMeta):
+    def __new__(cls, x=0, base=_sentinel):
+        if base is not _sentinel:
+            return int(x, base)
+        return int(x)
+
+
 class u8(metaclass=_NativeIntMeta):
     def __new__(cls, x=0, base=_sentinel):
         if base is not _sentinel:
@@ -227,7 +255,7 @@ def __new__(cls, x=0, base=_sentinel):
         return int(x)
 
 
-for _int_type in i64, i32, i16, u8:
+for _int_type in i64, i32, i16, i8, u64, u32, u16, u8:
     _int_type.__doc__ = \
         """A native fixed-width integer type when used with mypyc.
 
diff --git a/tests/testextensions.py b/tests/testextensions.py
index 72a4a49..068d160 100644
--- a/tests/testextensions.py
+++ b/tests/testextensions.py
@@ -5,7 +5,7 @@
 import warnings
 from contextlib import contextmanager
 from unittest import TestCase, main
-from mypy_extensions import TypedDict, i64, i32, i16, u8
+from mypy_extensions import TypedDict, i64, i32, i16, i8, u64, u32, u16, u8
 
 
 class BaseTestCase(TestCase):
@@ -150,7 +150,7 @@ def test_total(self):
         self.assertEqual(Options.__total__, False)  # noqa
 
 
-native_int_types = [i64, i32, i16, u8]
+native_int_types = [i64, i32, i16, i8, u64, u32, u16, u8]
 
 
 class MypycNativeIntTests(TestCase):