diff --git a/CMakeLists.txt b/CMakeLists.txt
index a2a6b29..d1439ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -99,7 +99,7 @@ set(2.lighting
     3.2.materials_exercise1
     4.1.lighting_maps_diffuse_map
     4.2.lighting_maps_specular_map
-    4.3.lighting_maps_exercise4
+    4.4.lighting_maps_exercise4
     5.1.light_casters_directional
     5.2.light_casters_point
     5.3.light_casters_spot