diff --git a/sandboxdata.go b/sandboxdata.go
index 76a538d..6b217a8 100644
--- a/sandboxdata.go
+++ b/sandboxdata.go
@@ -228,7 +228,6 @@ func (c *controller) LeaveAll(id string) error {
 	c.Unlock()
 
 	if !ok {
-		c.Unlock()
 		return fmt.Errorf("could not find sandbox for container id %s", id)
 	}