diff --git a/simgear/scene/viewer/ClusteredShading.cxx b/simgear/scene/viewer/ClusteredShading.cxx
index ba521a4d..f9a648ae 100644
--- a/simgear/scene/viewer/ClusteredShading.cxx
+++ b/simgear/scene/viewer/ClusteredShading.cxx
@@ -290,7 +290,6 @@ ClusteredShading::update(const SGLightList &light_list)
 
     // Force upload of the image data
     _light_grid->dirty();
-    _light_indices->dirty();
 
     // Upload pointlight and spotlight data
     writePointlightData();