diff --git a/lib/cmdlib.py b/lib/cmdlib.py
index 6814a2d4f5f0a7fb4646c6935dec51a967d128f5..46af2d4f8f0371029b1a941b83bab88b39b15acb 100644
--- a/lib/cmdlib.py
+++ b/lib/cmdlib.py
@@ -4411,7 +4411,7 @@ class LUGrowDisk(LogicalUnit):
     disk.RecordGrow(self.op.amount)
     self.cfg.Update(instance)
     if self.op.wait_for_sync:
-      disk_abort = not _WaitForSync(self.cfg, instance, self.proc)
+      disk_abort = not _WaitForSync(self, instance)
       if disk_abort:
         self.proc.LogWarning("Warning: disk sync-ing has not returned a good"
                              " status.\nPlease check the instance.")