diff --git a/reactos/base/system/expand/resource.h b/reactos/base/system/expand/resource.h
index 4cab40382e9..20560c1a96d 100644
--- a/reactos/base/system/expand/resource.h
+++ b/reactos/base/system/expand/resource.h
@@ -1,8 +1,10 @@
-
+#ifndef RESOURCE_H__
+#define RESOURCE_H__
 
 #define RC_STRING_MAX_SIZE                 4096
 #define IDS_Copy                            100
 #define IDS_FAILS                           101
 
+#endif
 
 /* EOF */