diff --git a/src/main.cpp b/src/main.cpp
index 63755c0..2506513 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -267,7 +267,7 @@ class VulkanApp {
     initImGui();
   }
 
-  void initImGui() {
+  fn initImGui() -> void {
     // Create ImGui context
     IMGUI_CHECKVERSION();
     ImGui::CreateContext();