diff --git a/framebuffer.h b/framebuffer.h
index 9bd75ce..58a2a47 100644
--- a/framebuffer.h
+++ b/framebuffer.h
@@ -1,6 +1,8 @@
 #include "types.h"
 #include "serial.h"
 #include "ports.h"
+#ifndef FRAMEBUFFER_H
+#define FRAMEBUFFER_H
 
 #define COLUMNS 80
 #define ROWS 25
@@ -47,4 +49,4 @@ void clear_fb(void);
 
 void fb_move_cursor(u16);
 
-
+#endif