Index: src/OFStream.m
==================================================================
--- src/OFStream.m
+++ src/OFStream.m
@@ -9,10 +9,13 @@
  * the packaging of this file.
  */
 
 #include "config.h"
 
+#define _GNU_SOURCE
+#include <stdarg.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #include <assert.h>
 
@@ -19,10 +22,12 @@
 #import "OFStream.h"
 #import "OFString.h"
 #import "OFDataArray.h"
 #import "OFExceptions.h"
 #import "macros.h"
+
+#import "asprintf.h"
 
 @implementation OFStream
 - init
 {
 	self = [super init];

Index: src/OFString.m
==================================================================
--- src/OFString.m
+++ src/OFString.m
@@ -11,10 +11,11 @@
 
 #include "config.h"
 
 #define _GNU_SOURCE
 #include <stdarg.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #ifdef HAVE_MADVISE
 #include <sys/mman.h>