diff --git a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
index 24ee28409bd9..1f35757c8543 100644
--- a/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
+++ b/specification/storage/data-plane/Microsoft.BlobStorage/preview/2019-12-12/blob.json
@@ -8773,9 +8773,6 @@
           {
             "$ref": "#/parameters/VersionId"
           },
-          {
-            "$ref": "#/parameters/ContentLength"
-          },
           {
             "$ref": "#/parameters/ContentMD5"
           },