diff --git a/include/proto/proto_http.h b/include/proto/proto_http.h
index 5a12998..5fcbced 100644
--- a/include/proto/proto_http.h
+++ b/include/proto/proto_http.h
@@ -74,6 +74,7 @@
 int apply_filter_to_req_line(struct session *t, struct buffer *req, struct hdr_exp *exp);
 int apply_filters_to_request(struct session *t, struct buffer *req, struct hdr_exp *exp);
 int apply_filters_to_response(struct session *t, struct buffer *rtr, struct hdr_exp *exp);
+void manage_client_side_appsession(struct session *t, const char *buf);
 void manage_client_side_cookies(struct session *t, struct buffer *req);
 void manage_server_side_cookies(struct session *t, struct buffer *rtr);
 void check_response_for_cacheability(struct session *t, struct buffer *rtr);