diff --git a/defaults.xml b/defaults.xml
index d46e6c4ae..7c4c1ec8e 100644
--- a/defaults.xml
+++ b/defaults.xml
@@ -224,6 +224,7 @@ Started September 2000 by David Megginson, david@megginson.com
         <eye-separation type="double" userarchive="y">0.05</eye-separation>
         <screen-distance type="double" userarchive="y">0.5</screen-distance>
         <stereo-mode type="string" userarchive="y">OFF</stereo-mode>
+        <split-stereo-autoadjust-aspect-ratio type="bool" userarchive="y">true</split-stereo-autoadjust-aspect-ratio>
       </osg-displaysettings>
       <osg-notify-level type="string" userarchive="y">warn</osg-notify-level>
       <cache type="bool">true</cache>
diff --git a/gui/dialogs/stereoscopic-view-options.xml b/gui/dialogs/stereoscopic-view-options.xml
index 265b6679a..c6ec94f2c 100644
--- a/gui/dialogs/stereoscopic-view-options.xml
+++ b/gui/dialogs/stereoscopic-view-options.xml
@@ -114,6 +114,20 @@
       </text>
   </group>
 
+  <group>
+    <layout>vbox</layout>
+    <padding>6</padding>
+    <checkbox>
+      <halign>left</halign>
+      <label>Adjust aspect ratio if split</label>
+      <property>/sim/rendering/osg-displaysettings/split-stereo-autoadjust-aspect-ratio</property>
+      <live>true</live>
+      <binding>
+        <command>dialog-apply</command>
+      </binding>
+    </checkbox>
+  </group>
+
   <empty>
     <stretch>true</stretch>
   </empty>