diff -ur globus_gsi_callback-4.1.orig/configure.in globus_gsi_callback-4.1/configure.in
--- globus_gsi_callback-4.1.orig/configure.in	2004-08-24 17:38:28.000000000 +0200
+++ globus_gsi_callback-4.1/configure.in	2011-12-27 06:14:17.942683037 +0100
@@ -13,6 +13,8 @@
 
 AC_CHECK_HEADERS(malloc.h sys/time.h unistd.h)
 
+GLOBUS_OPENSSL
+
 LAC_DOXYGEN(["../library"])
 
 GLOBUS_FINALIZE