diff --git a/m4/check-ssl.m4 b/m4/check-ssl.m4
index e5ebc92b5..80abf9836 100644
--- a/m4/check-ssl.m4
+++ b/m4/check-ssl.m4
@@ -66,3 +66,5 @@ AC_DEFUN([CHECK_SSL],
     fi
 ])dnl
 
+AC_SUBST(OPENSSL_CFLAGS)
+AC_SUBST(OPENSSL_LIBS)