diff --git a/redismodule.h b/redismodule.h
index 7f2e448..b21dde4 100644
--- a/redismodule.h
+++ b/redismodule.h
@@ -520,7 +520,8 @@ typedef void (*RedisModuleEventLoopOneShotFunc)(void *user_data);
 #define REDISMODULE_EVENT_KEY 17
 #define REDISMODULE_EVENT_CLUSTER_SLOT_MIGRATION 18
 #define REDISMODULE_EVENT_CLUSTER_SLOT_MIGRATION_TRIM 19
-#define _REDISMODULE_EVENT_NEXT 20 /* Next event flag, should be updated if a new event added. */
+#define REDISMODULE_EVENT_CLUSTER_TOPOLOGY_CHANGE 20
+#define _REDISMODULE_EVENT_NEXT 21 /* Next event flag, should be updated if a new event added. */
 
 typedef struct RedisModuleEvent {
     uint64_t id;        /* REDISMODULE_EVENT_... defines. */
@@ -639,6 +640,10 @@ static const RedisModuleEvent
     RedisModuleEvent_ClusterSlotMigrationTrim = {
         REDISMODULE_EVENT_CLUSTER_SLOT_MIGRATION_TRIM,
         1
+    },
+    RedisModuleEvent_ClusterTopologyChange = {
+        REDISMODULE_EVENT_CLUSTER_TOPOLOGY_CHANGE,
+        1
     };
 
 /* Those are values that are used for the 'subevent' callback argument. */
@@ -731,6 +736,11 @@ static const RedisModuleEvent
 #define REDISMODULE_SUBEVENT_CLUSTER_SLOT_MIGRATION_TRIM_BACKGROUND 2
 #define _REDISMODULE_SUBEVENT_CLUSTER_SLOT_MIGRATION_TRIM_NEXT 3
 
+#define REDISMODULE_SUBEVENT_CLUSTER_TOPOLOGY_CHANGE_STARTUP 0
+#define REDISMODULE_SUBEVENT_CLUSTER_TOPOLOGY_CHANGE_TOPOLOGY_CHANGED 1
+#define REDISMODULE_SUBEVENT_CLUSTER_TOPOLOGY_CHANGE_PRIMARY_CHANGED 2
+#define _REDISMODULE_SUBEVENT_CLUSTER_TOPOLOGY_CHANGE_NEXT 3
+
 /* RedisModuleClientInfo flags. */
 #define REDISMODULE_CLIENTINFO_FLAG_SSL (1<<0)
 #define REDISMODULE_CLIENTINFO_FLAG_PUBSUB (1<<1)