diff --git a/api-ref/source/v2/images-images-v2.inc b/api-ref/source/v2/images-images-v2.inc
index c5b52384dd..604433d504 100644
--- a/api-ref/source/v2/images-images-v2.inc
+++ b/api-ref/source/v2/images-images-v2.inc
@@ -452,6 +452,7 @@ Request
    - marker: marker
    - name: name-in-query
    - owner: owner-in-query
+   - protected: protected-in-query
    - status: status-in-query
    - tag: tag-in-query
    - visibility: visibility-in-query
diff --git a/api-ref/source/v2/images-parameters.yaml b/api-ref/source/v2/images-parameters.yaml
index f003ce4d60..a07a03da5e 100644
--- a/api-ref/source/v2/images-parameters.yaml
+++ b/api-ref/source/v2/images-parameters.yaml
@@ -156,6 +156,14 @@ owner-in-query:
   in: query
   required: false
   type: string
+protected-in-query:
+  description: |
+    Filters the response by the 'protected' image property.  A valid value is
+    one of 'true', 'false' (must be all lowercase).  Any other value will
+    result in a 400 response.
+  in: query
+  required: false
+  type: boolean
 size_max:
   description: |
     Filters the response by a maximum image size, in