diff --git a/confluent_server/aiohmi/redfish/command.py b/confluent_server/aiohmi/redfish/command.py
index 72360801..11074287 100644
--- a/confluent_server/aiohmi/redfish/command.py
+++ b/confluent_server/aiohmi/redfish/command.py
@@ -897,6 +897,13 @@ class Command(object):
         if not targurl:
             raise Exception("Unable to identify system url")
         targinfo = await self._do_web_request(targurl)
+        if ('IndicatorLED' not in targinfo
+                and 'LocationIndicatorActive' not in targinfo):
+            # Reading already knows when there is no indicator to speak of, so
+            # do not go on to write a property the platform never offered and
+            # let it answer with whatever it makes of that
+            raise exc.UnsupportedFunctionality(
+                'Indicator LED state is not reported by this platform')
         if ('IndicatorLED' not in targinfo
                 and 'LocationIndicatorActive' in targinfo):
             # IndicatorLED is deprecated in favour of a boolean, which has no