diff --git a/artiq/dashboard/moninj.py b/artiq/dashboard/moninj.py
index 6a3e22e41..c6e7c7338 100644
--- a/artiq/dashboard/moninj.py
+++ b/artiq/dashboard/moninj.py
@@ -8,7 +8,6 @@ from PyQt5 import QtCore, QtWidgets
 from artiq.coredevice.comm_moninj import CommMonInj, TTLOverride, TTLProbe
 from artiq.coredevice.ad9912_reg import AD9912_SER_CONF
 from artiq.gui.tools import LayoutWidget
-from artiq.gui.flowlayout import FlowLayout
 from artiq.gui.models import DictSyncTreeSepModel
 
 
@@ -856,15 +855,19 @@ class MonInjDock(QtWidgets.QDockWidget):
         layout.addWidget(add_channel_btn, 0, 0, colspan=1)
         scroll_area = QtWidgets.QScrollArea()
         layout.addWidget(scroll_area, 1, 0, colspan=10)
-        self.grid = FlowLayout()
+        self.grid = QtWidgets.QVBoxLayout()
+        self.spacer = QtWidgets.QSpacerItem(50, 500, QtWidgets.QSizePolicy.Ignored,
+                                            QtWidgets.QSizePolicy.Fixed)
         grid_widget = QtWidgets.QWidget()
         grid_widget.setLayout(self.grid)
         scroll_area.setWidgetResizable(True)
         scroll_area.setWidget(grid_widget)
 
     def layout_widgets(self, handlers):
+        self.grid.removeItem(self.spacer)
         for handler in handlers:
             self.grid.addWidget(handler.widget)
+        self.grid.insertItem(-1, self.spacer)
 
     def set_channels(self, handlers):
         self._channel_model.update(handlers)