diff --git a/configure.in b/configure.in
index ea2943417f..58fe291b07 100644
--- a/configure.in
+++ b/configure.in
@@ -18,7 +18,7 @@ AC_DIVERT_PUSH(AC_DIVERSION_NOTICE)dnl
 esyscmd([sed "s/^/# /" COPYRIGHT])dnl
 AC_DIVERT_POP()dnl
 
-AC_REVISION($Revision: 1.320 $)
+AC_REVISION($Revision: 1.321 $)
 
 AC_INIT(lib/dns/name.c)
 AC_PREREQ(2.13)
@@ -742,6 +742,19 @@ fi
 # End of pthreads stuff.
 #
 
+#
+# Large File
+#
+AC_ARG_ENABLE(largefile, [  --enable-largefile	  64-bit file support],
+	      want_largefile="yes", want_largefile="no")
+case $want_largefile in
+	yes)
+		ALWAYS_DEFINES="$ALWAYS_DEFINES -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"
+		;;
+	*)
+		;;
+esac
+
 #
 # Additional compiler settings.
 #