diff --git a/configure.in b/configure.in
index 67db25d7..df879335 100644
--- a/configure.in
+++ b/configure.in
@@ -1019,6 +1019,7 @@ AC_MSG_RESULT($cf_result)
 dnl Final SSL setup
 
 EL_CONFIG_DEPENDS(CONFIG_SSL, [CONFIG_OPENSSL CONFIG_GNUTLS], [SSL])
+AC_SUBST(CONFIG_GNUTLS_OPENSSL_COMPAT)
 AC_SUBST(CONFIG_OPENSSL)
 AC_SUBST(CONFIG_GNUTLS)