--- a/config.m4	2007-05-04 13:23:41.000000000 +0000
+++ b/config.m4	2010-03-28 01:13:10.000000000 +0000
@@ -41,4 +41,6 @@
   PHP_SUBST(GNUPG_SHARED_LIBADD)
 
   PHP_NEW_EXTENSION(gnupg, [gnupg.c gnupg_keylistiterator.c], $ext_shared)
+
+  AC_SYS_LARGEFILE
 fi