diff --git a/main.cpp b/main.cpp
index 1f47603..9cb5e01 100644
--- a/main.cpp
+++ b/main.cpp
@@ -21,8 +21,8 @@
 
 const int WIDTH {700};
 const int HEIGHT {700};
-constexpr double FPS {50.0};
-constexpr int nanosecs {static_cast<int>(round(1000000000.0 / FPS))};
+const double FPS {50.0};
+const int nanosecs {static_cast<int>(round(1000000000.0 / FPS))};
 
 sc::gui::Window* main_window {nullptr};
 sc::gui::Image* main_image {nullptr};