diff --git a/src/cam.h b/src/cam.h
index 366dbb3..282b2ea 100644
--- a/src/cam.h
+++ b/src/cam.h
@@ -1,3 +1,6 @@
+#ifndef CAM_H
+#define CAM_H
+
 #include "math/mat4.h"
 #include "math/vec4.h"
 
@@ -9,4 +12,6 @@ Mat4f_t lookAt(Vec4f_t* eye, Vec4f_t* center, Vec4f_t* up);
 
 Mat4f_t rotateX(float angle);
 Mat4f_t rotateY(float angle);
-Mat4f_t rotateZ(float angle);
\ No newline at end of file
+Mat4f_t rotateZ(float angle);
+
+#endif
\ No newline at end of file