diff --git a/include/osg/GeoSet b/include/osg/GeoSet
index 4d71e0570..2bf5105d1 100644
--- a/include/osg/GeoSet
+++ b/include/osg/GeoSet
@@ -598,6 +598,7 @@ void for_each_triangle(GeoSet& gset,T& op)
             
         }
         break;
+    case(GeoSet::FLAT_TRIANGLE_FAN):
     case(GeoSet::TRIANGLE_FAN):
     case(GeoSet::POLYGON):
         {