diff --git a/src/cluster.c b/src/cluster.c
index 17e86a6c..cf0c1bd3 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -2625,7 +2625,9 @@ void clusterLogCantFailover(int reason) {
 
     switch(reason) {
     case CLUSTER_CANT_FAILOVER_DATA_AGE:
-        msg = "Disconnected from master for longer than allowed.";
+        msg = "Disconnected from master for longer than allowed. "
+              "Please check the 'cluster-slave-validity-factor' configuration "
+              "option.";
         break;
     case CLUSTER_CANT_FAILOVER_WAITING_DELAY:
         msg = "Waiting the delay before I can start a new failover.";