===================================================================
RCS file: /cvs/cvs/blind/blind.h,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -p -r1.10 -r1.11
--- blind/blind.h	2022/03/29 20:11:47	1.10
+++ blind/blind.h	2022/04/03 09:14:25	1.11
@@ -14,6 +14,9 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#ifndef BLIND_H
+#define BLIND_H
+
 #include <limits.h>
 
 #define	BL_TEXT		"blind"
@@ -35,3 +38,5 @@ struct blind {
 	int		bl_ttl;
         uint32_t	bl_opt;
 };
+
+#endif /* BLIND_H */