diff --git a/invesalius/gui/dialogs.py b/invesalius/gui/dialogs.py
index dfcb8b7..14a8f43 100644
--- a/invesalius/gui/dialogs.py
+++ b/invesalius/gui/dialogs.py
@@ -168,6 +168,8 @@ def ShowImportDirDialog():
             folder = session.GetLastDicomFolder()
         else:
             folder = ''
+    else:
+        folder = ''
 
     dlg = wx.DirDialog(None, _("Choose a DICOM folder:"), folder,
                         style=wx.DD_DEFAULT_STYLE
--
libgit2 0.21.2