diff --git a/mantidimaging/gui/ui/main_window.ui b/mantidimaging/gui/ui/main_window.ui
index c2d6478c94f..e018df21afd 100644
--- a/mantidimaging/gui/ui/main_window.ui
+++ b/mantidimaging/gui/ui/main_window.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>800</width>
+    <width>850</width>
     <height>600</height>
    </rect>
   </property>