diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-06-12/blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-06-12/blob.json
index f447b5ec32e7..954ca5b11d63 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-06-12/blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2020-06-12/blob.json
@@ -4902,6 +4902,9 @@
           {
             "$ref": "#/parameters/ClientRequestId"
           },
+          {
+            "$ref": "#/parameters/SourceContentMD5"
+          },
           {
             "$ref": "#/parameters/BlobTagsHeader"
           },