diff --git a/piker/ui/_exec.py b/piker/ui/_exec.py
index d9ac918e..55a703b3 100644
--- a/piker/ui/_exec.py
+++ b/piker/ui/_exec.py
@@ -48,7 +48,7 @@ class MainWindow(QtGui.QMainWindow):
 
     def __init__(self, parent=None):
         super().__init__(parent)
-        # self.setMinimumSize(*self.size)
+        self.setMinimumSize(*self.size)
         self.setWindowTitle(self.title)