diff --git a/include/proto/checks.h b/include/proto/checks.h
index fb33746..d0c827b 100644
--- a/include/proto/checks.h
+++ b/include/proto/checks.h
@@ -63,6 +63,8 @@
 }
 
 void deinit_proxy_tcpcheck(struct proxy *px);
+int dup_tcpcheck_vars(struct list *dst, struct list *src);
+
 /* Declared here, but the definitions are in flt_spoe.c */
 int spoe_prepare_healthcheck_request(char **req, int *len);
 int spoe_handle_healthcheck_response(char *frame, size_t size, char *err, int errlen);