diff --git a/library/waku_thread/inter_thread_communication/requests/protocols/relay_request.nim b/library/waku_thread/inter_thread_communication/requests/protocols/relay_request.nim
index 130e203a4f..126dc65d22 100644
--- a/library/waku_thread/inter_thread_communication/requests/protocols/relay_request.nim
+++ b/library/waku_thread/inter_thread_communication/requests/protocols/relay_request.nim
@@ -141,5 +141,5 @@ proc process*(
         @[protectedShard], uint16(self.clusterId)
       )
     except ValueError:
-      return err(getCurrentExceptionMsg())
+      return err("ADD_PROTECTED_SHARD exception: " & getCurrentExceptionMsg())
   return ok("")