diff --git a/custom_components/pioneer_async/config_flow.py b/custom_components/pioneer_async/config_flow.py
index 6aa63bc..f2caa90 100755
--- a/custom_components/pioneer_async/config_flow.py
+++ b/custom_components/pioneer_async/config_flow.py
@@ -132,6 +132,8 @@ async def async_step_init(self, user_input=None):
                 ## Validate sources is a dict of names to numeric IDs
                 if CONF_SOURCES in options:
                     sources = json.loads(options[CONF_SOURCES])
+                    if type(sources) is not dict:
+                        raise Exception
                     for (source_name, source_id) in sources.items():
                         if not (
                             type(source_name) is str