diff --git a/backend/s3/s3.go b/backend/s3/s3.go
index 99641874b..94462b4bc 100644
--- a/backend/s3/s3.go
+++ b/backend/s3/s3.go
@@ -951,7 +951,7 @@ func (f *Fs) Features() *fs.Features {
 // retryErrorCodes is a slice of error codes that we will retry
 // See: https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html
 var retryErrorCodes = []int{
-	// 409, // Conflict - various states that could be resolved on a retry
+	500, // Internal Server Error - "We encountered an internal error. Please try again."
 	503, // Service Unavailable/Slow Down - "Reduce your request rate"
 }