--- gvpe/m4/openssl.m4	2003/03/01 16:59:26	1.1
+++ gvpe/m4/openssl.m4	2011/03/06 13:49:50	1.2
@@ -38,4 +38,12 @@
       [AC_MSG_ERROR([OpenSSL depends on libdl.])]
     )]
   )
+
+  AC_CHECK_FUNC(inflate,
+    [],
+    [AC_CHECK_LIB(z, inflate,
+      [LIBS="$LIBS -lz"],
+      [AC_MSG_ERROR([OpenSSL depends on libz.])]
+    )]
+  )
 ])