diff --git a/src/transport.c b/src/transport.c
index 45e445c..96fca6b 100644
--- a/src/transport.c
+++ b/src/transport.c
@@ -765,7 +765,7 @@ int _libssh2_transport_send(LIBSSH2_SESSION *session,
         ((session->state & LIBSSH2_STATE_AUTHENTICATED) ||
          session->local.comp->use_in_auth);
 
-    if(encrypted && compressed) {
+    if(encrypted && compressed && session->local.comp_abstract) {
         /* the idea here is that these function must fail if the output gets
            larger than what fits in the assigned buffer so thus they don't
            check the input size as we don't know how much it compresses */