diff --git a/plugins/transformation_gzip/gzip.c b/plugins/transformation_gzip/gzip.c
index 645c7736..6ba5844d 100644
--- a/plugins/transformation_gzip/gzip.c
+++ b/plugins/transformation_gzip/gzip.c
@@ -23,6 +23,11 @@ static int transform_gzip(struct wsgi_request *wsgi_req, struct uwsgi_transforma
 	struct uwsgi_transformation_gzip *utgz = (struct uwsgi_transformation_gzip *) ut->data;
 	struct uwsgi_buffer *ub = ut->chunk;
 
+        if (ub->pos == 0) {
+        	// Don't try to compress empty responses.
+        	return 0;
+        }
+
 	if (ut->is_final) {
 		if (uwsgi_gzip_fix(&utgz->z, utgz->crc32, ub, utgz->len)) {
 			free(utgz);