diff --git a/protobuf_definitions/req_rep.proto b/protobuf_definitions/req_rep.proto
index 4d4f982f..ac293058 100644
--- a/protobuf_definitions/req_rep.proto
+++ b/protobuf_definitions/req_rep.proto
@@ -177,6 +177,7 @@ message SetPersistentStorageSettingsReq {
 
 // Response after setting persistent storage settings.
 message SetPersistentStorageSettingsRep {
+  bool success = 1; // If the persistent storage settings were set successfully.
 }
 
 // Request to get currently set persistent storage settings.