diff --git a/include/init.h b/include/init.h
index e953da7..92b99f9 100644
--- a/include/init.h
+++ b/include/init.h
@@ -18,6 +18,9 @@
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#ifndef INIT_H
+#define INIT_H
+
 struct initcall_func {
 	void (*fptr)();
 };
@@ -29,3 +32,5 @@ struct initcall_func {
 #define early_initcall(func) _initcall("early", 0, func)
 #define driversubsys_initcall(func) _initcall("driversubsys", 1, func)
 #define device_initcall(func) _initcall("device", 2, func)
+
+#endif /* INIT_H */