diff --git a/data/shaders/header.txt b/data/shaders/header.txt
index 4ad33bd2a..a14e9539a 100644
--- a/data/shaders/header.txt
+++ b/data/shaders/header.txt
@@ -1,3 +1,5 @@
+#ifndef HEADER_TXT
+#define HEADER_TXT
 #ifdef UBO_DISABLED
 uniform mat4 ViewMatrix;
 uniform mat4 ProjectionMatrix;
@@ -61,4 +63,5 @@ layout (std140) uniform LightingData
     float rL21;
     float rL22;
 };
-#endif
\ No newline at end of file
+#endif
+#endif // HEADER_TXT