diff --git a/website/source/docs/secrets/aws/index.html.md b/website/source/docs/secrets/aws/index.html.md
index 7585fefbd1..36cc446658 100644
--- a/website/source/docs/secrets/aws/index.html.md
+++ b/website/source/docs/secrets/aws/index.html.md
@@ -195,6 +195,9 @@ If either of those conditions are not met, a "403 not-authorized" error will be
 
 See http://docs.aws.amazon.com/STS/latest/APIReference/API_GetFederationToken.html for more details.
 
+Vault 0.5.1 or later is recommended when using STS tokens to avoid validation errors for exceeding
+the AWS limit of 32 characters on STS token names.
+
 ## A Note on Consistency
 
 Unfortunately, IAM credentials are eventually consistent with respect to other