diff --git a/repo2docker/utils.py b/repo2docker/utils.py
index e3590274..9c2769e1 100644
--- a/repo2docker/utils.py
+++ b/repo2docker/utils.py
@@ -537,6 +537,10 @@ def get_platform():
     if m == "x86_64":
         return "linux/amd64"
     elif m == "aarch64":
+        # Linux reports aarch64
+        return "linux/arm64"
+    elif m == "arm64":
+        # OSX reports arm64
         return "linux/arm64"
     else:
         warnings.warn(f"Unexpected platform '{m}', defaulting to linux/amd64")
diff --git a/tests/unit/test_utils.py b/tests/unit/test_utils.py
index 39a4ffc4..c518bbd2 100644
--- a/tests/unit/test_utils.py
+++ b/tests/unit/test_utils.py
@@ -168,6 +168,7 @@ def test_local_pip_requirement(req, is_local):
     [
         ("x86_64", "linux/amd64"),
         ("aarch64", "linux/arm64"),
+        ("arm64", "linux/arm64"),
         ("other", "linux/amd64"),
     ],
 )