diff --git a/legacy/eio/configure.ac b/legacy/eio/configure.ac
index aed3bb49ef..4a163b1b54 100644
--- a/legacy/eio/configure.ac
+++ b/legacy/eio/configure.ac
@@ -33,6 +33,7 @@ AM_CONFIG_HEADER([config.h])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
 AC_GNU_SOURCE
+AC_SYS_LARGEFILE
 
 AC_LIBTOOL_WIN32_DLL
 define([AC_LIBTOOL_LANG_CXX_CONFIG], [:])dnl
diff --git a/legacy/eio/src/lib/eio_private.h b/legacy/eio/src/lib/eio_private.h
index ef22ef9eab..d0a71d0ef6 100644
--- a/legacy/eio/src/lib/eio_private.h
+++ b/legacy/eio/src/lib/eio_private.h
@@ -9,9 +9,6 @@
 # include <features.h>
 #endif
 
-#undef _FILE_OFFSET_BITS
-#define _FILE_OFFSET_BITS 64
-
 #include <stdio.h>
 #include <string.h>