diff --git a/compiler_gym/spaces/reward.py b/compiler_gym/spaces/reward.py
index a5952d1938..cccc2169d9 100644
--- a/compiler_gym/spaces/reward.py
+++ b/compiler_gym/spaces/reward.py
@@ -2,6 +2,7 @@
 #
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
+import warnings
 from typing import List, Optional, Tuple, Union
 
 import numpy as np
@@ -38,7 +39,10 @@ class Reward(Scalar):
 
     def __init__(
         self,
-        name: str,
+        # NOTE(github.com/facebookresearch/CompilerGym/issues/381): Once `id`
+        # argument has been removed, the default value for `name` can be
+        # removed.
+        name: str = None,
         observation_spaces: Optional[List[str]] = None,
         default_value: RewardType = 0,
         min: Optional[RewardType] = None,
@@ -47,6 +51,10 @@ def __init__(
         success_threshold: Optional[RewardType] = None,
         deterministic: bool = False,
         platform_dependent: bool = True,
+        # NOTE(github.com/facebookresearch/CompilerGym/issues/381): Backwards
+        # compatability workaround for deprecated parameter, will be removed in
+        # v0.2.4.
+        id: Optional[str] = None,
     ):
         """Constructor.
 
@@ -56,18 +64,18 @@ def __init__(
             (:class:`space.id <compiler_gym.views.ObservationSpaceSpec>` values)
             that are used to compute the reward. May be an empty list if no
             observations are requested. Requested observations will be provided
-            to the :code:`observations` argument of
-            :meth:`reward.update() <compiler_gym.spaces.Reward.update>`.
+            to the :code:`observations` argument of :meth:`reward.update()
+            <compiler_gym.spaces.Reward.update>`.
         :param default_value: A default reward. This value will be returned by
-            :meth:`env.step() <compiler_gym.envs.CompilerEnv.step>` if
-            the service terminates.
+            :meth:`env.step() <compiler_gym.envs.CompilerEnv.step>` if the
+            service terminates.
         :param min: The lower bound of the reward.
         :param max: The upper bound of the reward.
         :param default_negates_returns: If true, the default value will be
             offset by the sum of all rewards for the current episode. For
             example, given a default reward value of *-10.0* and an episode with
-            prior rewards *[0.1, 0.3, -0.15]*, the default value is:
-            *-10.0 - sum(0.1, 0.3, -0.15)*.
+            prior rewards *[0.1, 0.3, -0.15]*, the default value is: *-10.0 -
+            sum(0.1, 0.3, -0.15)*.
         :param success_threshold: The cumulative reward threshold before an
             episode is considered successful. For example, episodes where reward
             is scaled to an existing heuristic can be considered “successful”
@@ -75,6 +83,10 @@ def __init__(
         :param deterministic: Whether the reward space is deterministic.
         :param platform_dependent: Whether the reward values depend on the
             execution environment of the service.
+        :param id: The name of the reward space.
+
+            .. deprecated:: 0.2.3
+                Use :code:`name` instead.
         """
         super().__init__(
             name=name,
@@ -82,7 +94,23 @@ def __init__(
             max=np.inf if max is None else max,
             dtype=np.float64,
         )
-        self.name = name
+
+        # NOTE(github.com/facebookresearch/CompilerGym/issues/381): Backwards
+        # compatability workaround for deprecated parameter, will be removed in
+        # v0.2.4.
+        if id is not None:
+            warnings.warn(
+                "The `id` argument of "
+                "compiler_gym.spaces.Reward.__init__() "
+                "has been renamed `name`. This will break in a future release, "
+                "please update your code.",
+                DeprecationWarning,
+            )
+        self.name = name or id
+        self.id = self.name
+        if not self.name:
+            raise TypeError("No name given")
+
         self.observation_spaces = observation_spaces or []
         self.default_value: RewardType = default_value
         self.default_negates_returns: bool = default_negates_returns
diff --git a/tests/spaces/BUILD b/tests/spaces/BUILD
index e4a714c79b..678e738780 100644
--- a/tests/spaces/BUILD
+++ b/tests/spaces/BUILD
@@ -24,6 +24,16 @@ py_test(
     ],
 )
 
+py_test(
+    name = "reward_test",
+    timeout = "short",
+    srcs = ["reward_test.py"],
+    deps = [
+        "//compiler_gym/spaces",
+        "//tests:test_main",
+    ],
+)
+
 py_test(
     name = "scalar_test",
     timeout = "short",
diff --git a/tests/spaces/CMakeLists.txt b/tests/spaces/CMakeLists.txt
index d80905b624..1231328b9b 100644
--- a/tests/spaces/CMakeLists.txt
+++ b/tests/spaces/CMakeLists.txt
@@ -25,6 +25,16 @@ cg_py_test(
     tests::test_main
 )
 
+cg_py_test(
+  NAME
+    reward_test
+  SRCS
+    "reward_test.py"
+  DEPS
+    compiler_gym::spaces::spaces
+    tests::test_main
+)
+
 cg_py_test(
   NAME
     scalar_test
diff --git a/tests/spaces/reward_test.py b/tests/spaces/reward_test.py
new file mode 100644
index 0000000000..c0f6384d72
--- /dev/null
+++ b/tests/spaces/reward_test.py
@@ -0,0 +1,25 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+"""Unit tests for compiler_gym.spaces.Reward."""
+import pytest
+
+from compiler_gym.spaces import Reward
+from tests.test_main import main
+
+
+def test_reward_id_backwards_compatibility():
+    """Test that Reward.id is backwards compatible with Reward.name.
+
+    See: github.com/facebookresearch/CompilerGym/issues/381
+    """
+    with pytest.warns(DeprecationWarning, match="renamed `name`"):
+        reward = Reward(id="foo")
+
+    assert reward.id == "foo"
+    assert reward.name == "foo"
+
+
+if __name__ == "__main__":
+    main()