diff --git a/plugins/modules/ec2_ami_copy.py b/plugins/modules/ec2_ami_copy.py
index d88983f8452..15a69163d30 100644
--- a/plugins/modules/ec2_ami_copy.py
+++ b/plugins/modules/ec2_ami_copy.py
@@ -34,6 +34,7 @@
     description:
       - An optional human-readable string describing the contents and purpose of the new AMI.
     type: str
+    default: ''
   encrypted:
     description:
       - Whether or not the destination snapshots of the copied AMI should be encrypted.