diff --git a/src/hwrenderer/dynlights/hw_aabbtree.cpp b/src/hwrenderer/dynlights/hw_aabbtree.cpp
index 371ad9fc27..74bf1a62e5 100644
--- a/src/hwrenderer/dynlights/hw_aabbtree.cpp
+++ b/src/hwrenderer/dynlights/hw_aabbtree.cpp
@@ -117,7 +117,7 @@ bool LevelAABBTree::Update()
 			}
 		}
 	}
-	return modified;
+	return !modified;
 }
 
 TArray<int> LevelAABBTree::FindNodePath(unsigned int line, unsigned int node)