diff --git a/library/ec2 b/library/ec2
index 72544d8c314..1258d308eca 100644
--- a/library/ec2
+++ b/library/ec2
@@ -116,7 +116,7 @@ options:
     required: false
     default: null
     aliases: []
-  subnet_id:
+  vpc_subnet_id:
     version_added: "1.1"
     description:
       - the subnet ID in which to launch the instance (VPC)