diff --git a/osmclient/sol005/cluster.py b/osmclient/sol005/cluster.py
index 322576336986bee5962eafa465fc64a53120f132..8aa4b281f32b5b09fa7c8af88d8f067476b6ae80 100644
--- a/osmclient/sol005/cluster.py
+++ b/osmclient/sol005/cluster.py
@@ -72,7 +72,8 @@ class Cluster(GenericOSMAPIObject):
         try:
             _, resp = self._http.get2_cmd(f"{self._apiBase}/{item['_id']}/get_creds")
             if resp:
-                op_id = json.loads(resp)
+                resp = json.loads(resp)
+                op_id = resp["op_id"]
                 # Wait loop to check if the operation completed
                 result = self.wait_for_operation_status(item["_id"], 10, op_id)
                 if result: