diff --git a/src/include/66/66.h b/src/include/66/66.h
index b532d137f4eb5345b24ff2b4215ddd21d51a6ad7..3c91c14c4664104ac71a6f819d06b3da52a455df 100644
--- a/src/include/66/66.h
+++ b/src/include/66/66.h
@@ -12,8 +12,8 @@
  * except according to the terms contained in the LICENSE file./
  */
 
-#ifndef SS_H
-#define SS_H
+#ifndef SS_CONFIG_H
+#define SS_CONFIG_H
 
 #include <66/backup.h>
 #include <66/config.h>
@@ -26,6 +26,7 @@
 #include <66/parser.h>
 #include <66/rc.h>
 #include <66/resolve.h>
+#include <66/service.h>
 #include <66/ssexec.h>
 #include <66/state.h>
 #include <66/svc.h>