diff --git a/daemon/graphdriver/devmapper/devmapper.go b/daemon/graphdriver/devmapper/devmapper.go
index a6602c276e..2590ec0fc1 100644
--- a/daemon/graphdriver/devmapper/devmapper.go
+++ b/daemon/graphdriver/devmapper/devmapper.go
@@ -369,7 +369,7 @@ func reloadPool(poolName string, dataFile, metadataFile *os.File) error {
 		return fmt.Errorf("Can't get data size %s", err)
 	}
 
-	params := metadataFile.Name() + " " + dataFile.Name() + " 128 32768"
+	params := metadataFile.Name() + " " + dataFile.Name() + " 128 32768 1 skip_block_zeroing"
 	if err := task.AddTarget(0, size/512, "thin-pool", params); err != nil {
 		return fmt.Errorf("Can't add target %s", err)
 	}