diff --git a/qt/base/directories_dialog.py b/qt/base/directories_dialog.py
index 421ec6f1..51f3a432 100644
--- a/qt/base/directories_dialog.py
+++ b/qt/base/directories_dialog.py
@@ -13,6 +13,7 @@ from PyQt4.QtGui import (QWidget, QFileDialog, QHeaderView, QVBoxLayout, QHBoxLa
 
 from hscommon.trans import tr, trmsg
 from qtlib.recent import Recent
+from qtlib.util import moveToScreenCenter
 from core.app import NoScannableFileError
 
 from . import platform
@@ -144,6 +145,8 @@ class DirectoriesDialog(QMainWindow):
         
         if self.app.prefs.directoriesWindowRect is not None:
             self.setGeometry(self.app.prefs.directoriesWindowRect)
+        else:
+            moveToScreenCenter(self)
     
     def _updateAddButton(self):
         if self.recentFolders.isEmpty():
diff --git a/qt/base/result_window.py b/qt/base/result_window.py
index 6488205b..45690ce2 100644
--- a/qt/base/result_window.py
+++ b/qt/base/result_window.py
@@ -15,6 +15,7 @@ from PyQt4.QtGui import (QMainWindow, QMenu, QLabel, QHeaderView, QMessageBox, Q
 
 from hscommon.trans import tr, trmsg
 from hscommon.util import nonone
+from qtlib.util import moveToScreenCenter
 
 from .results_model import ResultsModel, ResultsView
 from .stats_label import StatsLabel
@@ -192,8 +193,11 @@ class ResultWindow(QMainWindow):
         
         if self.app.prefs.resultWindowIsMaximized:
             self.setWindowState(self.windowState() | Qt.WindowMaximized)
-        if self.app.prefs.resultWindowRect is not None and not self.app.prefs.resultWindowIsMaximized:
-            self.setGeometry(self.app.prefs.resultWindowRect)
+        else:
+            if self.app.prefs.resultWindowRect is not None:
+                self.setGeometry(self.app.prefs.resultWindowRect)
+            else:
+                moveToScreenCenter(self)
     
     #--- Private
     def _load_columns(self):