diff --git a/src/proto_http.c b/src/proto_http.c
index c7d91d318..639967359 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -2584,14 +2584,16 @@ int process_srv(struct session *t)
 							delete_header = 1;
 							t->flags |= SN_SCK_DELETED;
 						}
-						else if ((t->srv) && (t->be->beprm->options & PR_O_COOK_RW)) {
+						else if ((t->srv) && (t->srv->cookie) &&
+							 (t->be->beprm->options & PR_O_COOK_RW)) {
 							/* replace bytes p3->p4 with the cookie name associated
 							 * with this server since we know it.
 							 */
 							buffer_replace2(rep, p3, p4, t->srv->cookie, t->srv->cklen);
 							t->flags |= SN_SCK_INSERTED | SN_SCK_DELETED;
 						}
-						else if ((t->srv) && (t->be->beprm->options & PR_O_COOK_PFX)) {
+						else if ((t->srv) && (t->srv->cookie) &&
+							 (t->be->beprm->options & PR_O_COOK_PFX)) {
 							/* insert the cookie name associated with this server
 							 * before existing cookie, and insert a delimitor between them..
 							 */
@@ -4087,7 +4089,8 @@ void manage_client_side_cookies(struct session *t, struct buffer *req)
 						srv = NULL;
 
 					while (srv) {
-						if ((srv->cklen == delim - p3) && !memcmp(p3, srv->cookie, delim - p3)) {
+						if (srv->cookie && (srv->cklen == delim - p3) &&
+						    !memcmp(p3, srv->cookie, delim - p3)) {
 							if (srv->state & SRV_RUNNING || t->be->beprm->options & PR_O_PERSIST) {
 								/* we found the server and it's usable */
 								t->flags &= ~SN_CK_MASK;