diff --git a/compilesketches/compilesketches.py b/compilesketches/compilesketches.py
index a02cad5..00236a8 100644
--- a/compilesketches/compilesketches.py
+++ b/compilesketches/compilesketches.py
@@ -1453,6 +1453,11 @@ def cli_core_list_platform_list(self, data):
             or semver.Version.parse(version=self.cli_version).compare(other=first_new_interface_version) >= 0
         ):
             # cli_version is either "latest" (which will now always be >=1.0.0) or an explicit version >=1.0.0
+
+            # Workaround for https://github.com/arduino/arduino-cli/issues/2690
+            if data["platforms"] is None:
+                return []
+
             return data["platforms"]
 
         return data
diff --git a/compilesketches/tests/test_compilesketches.py b/compilesketches/tests/test_compilesketches.py
index 0563dda..95ed1e1 100644
--- a/compilesketches/tests/test_compilesketches.py
+++ b/compilesketches/tests/test_compilesketches.py
@@ -2886,6 +2886,7 @@ def test_create_sketches_report_file(monkeypatch, tmp_path):
 @pytest.mark.parametrize(
     "cli_version, data, assertion",
     [
+        ("latest", {"platforms": None}, []),  # Non-semver
         ("latest", {"platforms": [unittest.mock.sentinel.list_item]}, [unittest.mock.sentinel.list_item]),  # Non-semver
         ("2.0.0", {"platforms": [unittest.mock.sentinel.list_item]}, [unittest.mock.sentinel.list_item]),  # >
         ("1.0.0", {"platforms": [unittest.mock.sentinel.list_item]}, [unittest.mock.sentinel.list_item]),  # ==