diff --git a/yaml/com/ibm/ipzvpd/VSBK.interface.yaml b/yaml/com/ibm/ipzvpd/VSBK.interface.yaml
index 79c34fd..060244a 100644
--- a/yaml/com/ibm/ipzvpd/VSBK.interface.yaml
+++ b/yaml/com/ibm/ipzvpd/VSBK.interface.yaml
@@ -65,3 +65,7 @@
       type: array[byte]
       description: >
           F6 keyword.
+    - name: D1
+      type: array[byte]
+      description: >
+          D1 keyword.