diff --git a/simgear/canvas/events/CustomEvent.cxx b/simgear/canvas/events/CustomEvent.cxx
index 3ca8ff18..a85a6efd 100644
--- a/simgear/canvas/events/CustomEvent.cxx
+++ b/simgear/canvas/events/CustomEvent.cxx
@@ -25,16 +25,20 @@ namespace canvas
 
   //----------------------------------------------------------------------------
   CustomEvent::CustomEvent( std::string const& type_str,
+                            bool bubbles,
                             StringMap const& data ):
-    detail(data)
+    detail(data),
+    bubbles(bubbles)
   {
     type = getOrRegisterType(type_str);
   }
 
   //----------------------------------------------------------------------------
   CustomEvent::CustomEvent( int type_id,
+                            bool bubbles,
                             StringMap const& data ):
-    detail(data)
+    detail(data),
+    bubbles(bubbles)
   {
     type = type_id;
 //    TypeMap::map_by<id>::type const& type_map = getTypeMap().by<id>();
diff --git a/simgear/canvas/events/CustomEvent.hxx b/simgear/canvas/events/CustomEvent.hxx
index cb48becc..1117ba3f 100644
--- a/simgear/canvas/events/CustomEvent.hxx
+++ b/simgear/canvas/events/CustomEvent.hxx
@@ -39,6 +39,7 @@ namespace canvas
        * @param data        Optional user data stored in event
        */
       CustomEvent( std::string const& type_str,
+                   bool bubbles = false,
                    StringMap const& data = StringMap() );
 
       /**
@@ -47,6 +48,7 @@ namespace canvas
        * @param data        Optional user data stored in event
        */
       CustomEvent( int type_id,
+                   bool bubbles = false,
                    StringMap const& data = StringMap() );
 
       /**