diff --git a/include/proto/proxy.h b/include/proto/proxy.h
index b2e97fe..d5fd3e0 100644
--- a/include/proto/proxy.h
+++ b/include/proto/proxy.h
@@ -69,6 +69,7 @@
 	proxy->timeout.appsession = TICK_ETERNITY;
 	proxy->timeout.httpreq = TICK_ETERNITY;
 	proxy->timeout.check = TICK_ETERNITY;
+	proxy->timeout.tunnel = TICK_ETERNITY;
 }
 
 /* increase the number of cumulated connections received on the designated frontend */
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 26af501..a94eee7 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -263,6 +263,7 @@
 		int httpreq;                    /* maximum time for complete HTTP request */
 		int httpka;                     /* maximum time for a new HTTP request when using keep-alive */
 		int check;                      /* maximum time for complete check */
+		int tunnel;                     /* I/O timeout to use in tunnel mode (in ticks) */
 	} timeout;
 	char *id, *desc;			/* proxy id (name) and description */
 	struct list pendconns;			/* pending connections with no server assigned yet */