diff --git a/fastly/resource_fastly_service_v1.go b/fastly/resource_fastly_service_v1.go
index a40ea261a..b4a239dc7 100644
--- a/fastly/resource_fastly_service_v1.go
+++ b/fastly/resource_fastly_service_v1.go
@@ -4061,21 +4061,23 @@ func flattenS3s(s3List []*gofastly.S3) []map[string]interface{} {
 	for _, s := range s3List {
 		// Convert S3s to a map for saving to state.
 		ns := map[string]interface{}{
-			"name":               s.Name,
-			"bucket_name":        s.BucketName,
-			"s3_access_key":      s.AccessKey,
-			"s3_secret_key":      s.SecretKey,
-			"path":               s.Path,
-			"period":             s.Period,
-			"domain":             s.Domain,
-			"gzip_level":         s.GzipLevel,
-			"format":             s.Format,
-			"format_version":     s.FormatVersion,
-			"timestamp_format":   s.TimestampFormat,
-			"redundancy":         s.Redundancy,
-			"response_condition": s.ResponseCondition,
-			"message_type":       s.MessageType,
-			"placement":          s.Placement,
+			"name":                              s.Name,
+			"bucket_name":                       s.BucketName,
+			"s3_access_key":                     s.AccessKey,
+			"s3_secret_key":                     s.SecretKey,
+			"path":                              s.Path,
+			"period":                            s.Period,
+			"domain":                            s.Domain,
+			"gzip_level":                        s.GzipLevel,
+			"format":                            s.Format,
+			"format_version":                    s.FormatVersion,
+			"timestamp_format":                  s.TimestampFormat,
+			"redundancy":                        s.Redundancy,
+			"response_condition":                s.ResponseCondition,
+			"message_type":                      s.MessageType,
+			"placement":                         s.Placement,
+			"server_side_encryption":            s.ServerSideEncryption,
+			"server_side_encryption_kms_key_id": s.ServerSideEncryptionKMSKeyID,
 		}
 
 		// prune any empty values that come from the default string value in structs