1 files changed, 4 insertions, 2 deletions
diff --git a/lib/fileio.h b/lib/fileio.h
index 158da10a..586c8265 100644
--- a/lib/fileio.h
+++ b/lib/fileio.h
@@ -1,5 +1,7 @@
-#ifndef _NETPBM_FILEIO_H_
-#define _NETPBM_FILEIO_H_
+#ifndef FILEIO_H_INCLUDED
+#define FILEIO_H_INCLUDED
+
+#include <stdio.h>
 
 char
 pm_getc(FILE * const file);