Index: src/OFFile.m
==================================================================
--- src/OFFile.m
+++ src/OFFile.m
@@ -12,10 +12,12 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 #include "config.h"
+
+#define _LARGEFILE64_SOURCE
 
 #include <assert.h>
 #include <errno.h>
 
 #ifdef HAVE_FCNTL_H

Index: src/OFFileURLHandler.m
==================================================================
--- src/OFFileURLHandler.m
+++ src/OFFileURLHandler.m
@@ -12,10 +12,12 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 #include "config.h"
+
+#define _LARGEFILE64_SOURCE
 
 #include <errno.h>
 #include <math.h>
 
 #ifdef HAVE_DIRENT_H