diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e2dfdc..2310cb9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -57,7 +57,7 @@ set(ASSETS_fx
 )
 
 set(ASSETS_fx_1b
-  assets-fx/levels/tileset1b.png
+  assets-fx/levels/tileset_1b.png
   # ...
 )