diff --git a/src/cluster.c b/src/cluster.c
index dc4540c2..a2d79164 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -481,7 +481,8 @@ void clusterInit(void) {
  * 3) If the node is a slave, it turns into a master.
  * 5) Only for hard reset: a new Node ID is generated.
  * 6) Only for hard reset: currentEpoch and configEpoch are set to 0.
- * 7) The new configuration is saved and the cluster state updated.  */
+ * 7) The new configuration is saved and the cluster state updated.
+ * 8) If the node was a slave, the whole data set is flushed away. */
 void clusterReset(int hard) {
     dictIterator *di;
     dictEntry *de;
@@ -491,6 +492,7 @@ void clusterReset(int hard) {
     if (nodeIsSlave(myself)) {
         clusterSetNodeAsMaster(myself);
         replicationUnsetMaster();
+        emptyDb(NULL);
     }
 
     /* Close slots, reset manual failover state. */