Index: src/of_asprintf.m
==================================================================
--- src/of_asprintf.m
+++ src/of_asprintf.m
@@ -15,10 +15,11 @@
  */
 
 #include "config.h"
 
 #define _GNU_SOURCE
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <stdbool.h>
 #include <wchar.h>