diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index 21a21af..4ceca7ba2 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -41,10 +41,12 @@
 void ShellDelegateImpl::LockScreen() {
   ash::shell::CreateLockScreen();
   locked_ = true;
+  ash::Shell::GetInstance()->UpdateShelfVisibility();
 }
 
 void ShellDelegateImpl::UnlockScreen() {
   locked_ = false;
+  ash::Shell::GetInstance()->UpdateShelfVisibility();
 }
 
 bool ShellDelegateImpl::IsScreenLocked() const {