diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f6c235..57490c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,7 +55,7 @@ set(ASSETS_fx
 )
 
 set(ASSETS_fx_1b
-  assets-fx/levels/tileset_1b.png
+  assets-fx/levels/tileset1b.png
   # ...
 )
 
diff --git a/assets-fx/levels/tileset_1b.png b/assets-fx/levels/tileset1b.png
similarity index 100%
rename from assets-fx/levels/tileset_1b.png
rename to assets-fx/levels/tileset1b.png