diff --git a/configure.ac b/configure.ac
index 96acffc3..49acdb92 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,6 +7,7 @@ AC_CONFIG_AUX_DIR([build-aux])
 AM_INIT_AUTOMAKE([1.11 -Wno-portability foreign no-define tar-ustar no-dist-gzip dist-xz])
 AM_MAINTAINER_MODE([enable])
 AM_SILENT_RULES([yes])
+AC_SYS_LARGEFILE
 
 AC_PROG_CC
 AM_PROG_CC_C_O