diff --git a/renderers/SFML2/clay_renderer_SFML2.hpp b/renderers/SFML2/clay_renderer_SFML2.hpp
index 51b23af..8d4fe57 100644
--- a/renderers/SFML2/clay_renderer_SFML2.hpp
+++ b/renderers/SFML2/clay_renderer_SFML2.hpp
@@ -1,3 +1,4 @@
+#pragma once
 #include "../../clay.h"
 #include <SFML/Graphics.hpp>
 #include <queue>