diff --git a/modules/spacecraftinstruments/rendering/renderableshadowcylinder.cpp b/modules/spacecraftinstruments/rendering/renderableshadowcylinder.cpp
index be1f8efef7..0e1c4ca3cc 100644
--- a/modules/spacecraftinstruments/rendering/renderableshadowcylinder.cpp
+++ b/modules/spacecraftinstruments/rendering/renderableshadowcylinder.cpp
@@ -250,7 +250,7 @@ void RenderableShadowCylinder::deinitializeGL() {
 }
 
 bool RenderableShadowCylinder::isReady() const {
-    return true;
+    return _shader;
 }
 
 void RenderableShadowCylinder::render(const RenderData& data, RendererTasks&) {