diff --git a/cloud/amazon/elasticache.py b/cloud/amazon/elasticache.py
index a22bea70d72..590dd987018 100644
--- a/cloud/amazon/elasticache.py
+++ b/cloud/amazon/elasticache.py
@@ -50,7 +50,7 @@ options:
     default: cache.m1.small
   num_nodes:
     description:
-      - The initial number of cache nodes that the cache cluster will have
+      - The initial number of cache nodes that the cache cluster will have. Required when state=present.
     required: false
   cache_port:
     description: