diff --git a/include/rtservice.h b/include/rtservice.h
index 31adc54a73..26ee8e0a8a 100644
--- a/include/rtservice.h
+++ b/include/rtservice.h
@@ -15,6 +15,9 @@
  * 2012-03-22     Bernard      rename kservice.h to rtservice.h
  */
 
+#ifndef __RT_SERVICE_H__
+#define __RT_SERVICE_H__
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -105,3 +108,5 @@ rt_inline int rt_list_isempty(const rt_list_t *l)
 #ifdef __cplusplus
 }
 #endif
+
+#endif