diff --git a/src/history_manager.py b/src/history_manager.py
index 49ad8151e..5bd4b05a9 100644
--- a/src/history_manager.py
+++ b/src/history_manager.py
@@ -50,6 +50,7 @@ if os.name == 'nt':
 import sys
 import signal
 from gi.repository import Gtk
+from gi.repository import Gdk
 from gi.repository import GObject
 import time
 import locale