diff --git a/api/wallet/spec/paths/wallets.yaml b/api/wallet/spec/paths/wallets.yaml
index 45a7bfb4..cc37912e 100644
--- a/api/wallet/spec/paths/wallets.yaml
+++ b/api/wallet/spec/paths/wallets.yaml
@@ -7,7 +7,9 @@ get:
   parameters:
     - $ref: "#/parameters/requestID"
     - $ref: "#/parameters/deadline"
-    - $ref: "#/parameters/partyID"
+    - x-rebillyMerge:
+        - required: true
+        - $ref: "#/parameters/partyID"
     - name: identityID
       description: Identifier of owner's identity
       in: query