diff --git a/service/fit.py b/service/fit.py
index c6898384f..b33225932 100644
--- a/service/fit.py
+++ b/service/fit.py
@@ -408,7 +408,10 @@ class Fit(object):
             module.state = State.ONLINE
             fit.projectedModules.append(module)
         else:
-            module = es_Module(thing)
+            try:
+                module = es_Module(thing)
+            except ValueError:
+                return False
             module.state = State.ACTIVE
             if not module.canHaveState(module.state, fit):
                 module.state = State.OFFLINE