diff --git a/src/main.c b/src/main.c
index a4db99c..868dff8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -26,6 +26,10 @@ static void quit(void)
 	glfwTerminate();
 }
 
+#if __has_extension(c_static_assert)
+__extension__ _Static_assert(-3 >> 5 == -1,
+	"The platform does not compile right-shifting signed integers to an arithmetic shift!");
+#endif
 
 /* Entry-point of the application. */
 int main(int argc, char **argv)