Index: aocdailies.h
==================================================================
--- aocdailies.h
+++ aocdailies.h
@@ -1,7 +1,7 @@
-#ifndef AOCDAILY_H_INCLUDED
-#define AOCDAILY_H_INCLUDED
+#ifndef AOCDAILIES_H_INCLUDED
+#define AOCDAILIES_H_INCLUDED
 
 #include <stddef.h>
 
 typedef void aocfunc(char *, size_t);
 aocfunc *select(int, int);