diff --git a/src/Objects/pt_lights.cxx b/src/Objects/pt_lights.cxx
index b778d75d4..3041d1feb 100644
--- a/src/Objects/pt_lights.cxx
+++ b/src/Objects/pt_lights.cxx
@@ -28,6 +28,9 @@
 
 #include "pt_lights.hxx"
 
+SG_USING_STD(cout);
+SG_USING_STD(endl);
+
 
 // strobe pre-draw (we want a larger point size)
 static int StrobePreDraw( ssgEntity *e ) {