diff --git a/common/lib/xmodule/xmodule/capa_module.py b/common/lib/xmodule/xmodule/capa_module.py
index ead138a225..4c10a1703a 100644
--- a/common/lib/xmodule/xmodule/capa_module.py
+++ b/common/lib/xmodule/xmodule/capa_module.py
@@ -149,7 +149,7 @@ class CapaModule(XModule):
         # Need the problem location in openendedresponse to send out.  Adding
         # it to the system here seems like the least clunky way to get it
         # there.
-        self.system.set('location', self.location)
+        self.system.set('location', self.location.url())
 
         try:
             # TODO (vshnayder): move as much as possible of this work and error