diff --git a/api-ref/source/parameters.yaml b/api-ref/source/parameters.yaml
index f4bad3ccf0..4cfb22d77b 100644
--- a/api-ref/source/parameters.yaml
+++ b/api-ref/source/parameters.yaml
@@ -683,6 +683,14 @@ X-Copy-From:
   in: header
   required: false
   type: string
+X-Copy-From-Account:
+  description: |
+    Specifies the account name where the object is copied from. If not
+    specified, the object is copied from the account which owns the new
+    object (i.e., the account in the path).
+  in: header
+  required: false
+  type: string
 X-Delete-After:
   description: |
     The number of seconds after which the system
diff --git a/api-ref/source/storage-object-services.inc b/api-ref/source/storage-object-services.inc
index 72927a6052..32dd8cb05f 100644
--- a/api-ref/source/storage-object-services.inc
+++ b/api-ref/source/storage-object-services.inc
@@ -254,6 +254,7 @@ Request
    - Content-Type: Content-Type_obj_cu_req
    - X-Detect-Content-Type: X-Detect-Content-Type
    - X-Copy-From: X-Copy-From
+   - X-Copy-From-Account: X-Copy-From-Account
    - ETag: ETag_obj_req
    - Content-Disposition: Content-Disposition
    - Content-Encoding: Content-Encoding