diff --git a/include/types/server.h b/include/types/server.h
index be11605..0e4c33e 100644
--- a/include/types/server.h
+++ b/include/types/server.h
@@ -117,6 +117,7 @@
 	int send_proxy;				/* send a PROXY protocol header with checks */
 	int inter, fastinter, downinter;        /* checks: time in milliseconds */
 	int result;				/* health-check result : SRV_CHK_* */
+	int type;				/* Check type, one of PR_O2_*_CHK */
 	struct server *server;			/* back-pointer to server */
 };