diff --git a/daemon/remote.c b/daemon/remote.c
index 05905a32442ea1439c7a8f1bae9dbbe7df5af27e..c93c97a3261b2213d7943d17c210d7c53b917fd0 100644
--- a/daemon/remote.c
+++ b/daemon/remote.c
@@ -986,8 +986,8 @@ remoteRelayDomainEventTunable(virConnectPtr conn,
         !remoteRelayDomainEventCheckACL(callback->client, conn, dom))
         return -1;
 
-    VIR_DEBUG("Relaying domain tunable event %s %d, callback %d",
-              dom->name, dom->id, callback->callbackID);
+    VIR_DEBUG("Relaying domain tunable event %s %d, callback %d, params %p %d",
+              dom->name, dom->id, callback->callbackID, params, nparams);
 
     /* build return data */
     memset(&data, 0, sizeof(data));
diff --git a/src/remote/remote_protocol.x b/src/remote/remote_protocol.x
index 1a588dc0dfdd4871ca963e302d06a7386b19fa2a..db12cdadd0a9f2771e0a4933928e2c333ff6be2b 100644
--- a/src/remote/remote_protocol.x
+++ b/src/remote/remote_protocol.x
@@ -248,7 +248,7 @@ const REMOTE_NETWORK_DHCP_LEASES_MAX = 65536;
 const REMOTE_CONNECT_GET_ALL_DOMAIN_STATS_MAX = 4096;
 
 /* Upper limit of message size for tunable event. */
-const REMOTE_DOMAIN_EVENT_TUNABLE_MAX = 8388608;
+const REMOTE_DOMAIN_EVENT_TUNABLE_MAX = 2048;
 
 /* UUID.  VIR_UUID_BUFLEN definition comes from libvirt.h */
 typedef opaque remote_uuid[VIR_UUID_BUFLEN];