diff --git a/src/tar_type.h b/src/tar_type.h
index d032a08098..b622da6449 100644
--- a/src/tar_type.h
+++ b/src/tar_type.h
@@ -1,6 +1,7 @@
 /* $Id$ */
 
 #ifndef TAR_TYPE_H
+#define TAR_TYPE_H
 
 /** @file tar_type.h Structs, typedefs and macros used for TAR file handling. */