diff --git a/simgear/scene/tgdb/GroundLightManager.cxx b/simgear/scene/tgdb/GroundLightManager.cxx
index d500103b..e35e638e 100644
--- a/simgear/scene/tgdb/GroundLightManager.cxx
+++ b/simgear/scene/tgdb/GroundLightManager.cxx
@@ -24,7 +24,6 @@ namespace simgear
 {
 GroundLightManager::GroundLightManager()
 {
-    osg::Fog* fog;
     runwayLightSS = makeLightSS();
     taxiLightSS = makeLightSS();
     groundLightSS = makeLightSS();