diff --git a/qtile/config.py b/qtile/config.py
index 0fe2d86..4cff8ab 100644
--- a/qtile/config.py
+++ b/qtile/config.py
@@ -224,6 +224,7 @@ floating_layout = layout.Floating(float_rules=[
     {'wmclass': 'maketag'},  # gitk
     {'wname': 'branchdialog'},  # gitk
     {'wname': 'pinentry'},  # GPG key password entry
+    {'wmclass': 'pinentry-gtk-2'},  # GTK+2 GPG password entry
     {'wmclass': 'ssh-askpass'},  # ssh-askpass
 ])
 auto_fullscreen = True