1 files changed, 5 insertions, 0 deletions
diff --git a/tar.h b/tar.h
index 3467705..6b258c4 100644
--- a/tar.h
+++ b/tar.h
@@ -1,3 +1,6 @@
+#ifndef TAR_H
+#define TAR_H
+
 #define TYPEFLAG_AUTO		'\0'
 #define TYPEFLAG_REG		'0'
 #define TYPEFLAG_LNK		'2'
@@ -23,3 +26,5 @@ struct ustar_header {
 	char devminor[8];	/* 337 */
 	char prefix[155];	/* 345 */
 };
+
+#endif /* TAR_H */