diff --git a/supervisor/addons/options.py b/supervisor/addons/options.py
index 8a6c325e9..1c7e4d737 100644
--- a/supervisor/addons/options.py
+++ b/supervisor/addons/options.py
@@ -169,6 +169,10 @@ class AddonOptions(CoreSysAttributes):
         elif typ.startswith(_LIST):
             return vol.In(match.group("list").split("|"))(str(value))
         elif typ.startswith(_DEVICE):
+            if not isinstance(value, str):
+                raise vol.Invalid(
+                    f"Expected a string for option '{key}' in {self._name} ({self._slug})"
+                )
             try:
                 device = self.sys_hardware.get_by_path(Path(value))
             except HardwareNotFound:
diff --git a/tests/addons/test_options.py b/tests/addons/test_options.py
index f47fc24ed..72e2d7a54 100644
--- a/tests/addons/test_options.py
+++ b/tests/addons/test_options.py
@@ -273,6 +273,25 @@ def test_simple_device_schema(coresys):
         )({"name": "Pascal", "password": "1234", "input": "/dev/video1"})
 
 
+def test_device_schema_wrong_type(coresys):
+    """Test device option rejects non-string values."""
+    with pytest.raises(vol.error.Invalid):
+        AddonOptions(
+            coresys,
+            {"name": "str", "input": "device(subsystem=tty)"},
+            MOCK_ADDON_NAME,
+            MOCK_ADDON_SLUG,
+        )({"name": "Pascal", "input": {"baudrate": 115200, "flow_control": True}})
+
+    with pytest.raises(vol.error.Invalid):
+        AddonOptions(
+            coresys,
+            {"name": "str", "input": "device"},
+            MOCK_ADDON_NAME,
+            MOCK_ADDON_SLUG,
+        )({"name": "Pascal", "input": 12345})
+
+
 def test_simple_schema_password(coresys):
     """Test with simple schema password pwned."""
     validate = AddonOptions(