diff --git a/desktop-widgets/preferences/preferences_units.ui b/desktop-widgets/preferences/preferences_units.ui
index 4093181d4..49ef80a22 100644
--- a/desktop-widgets/preferences/preferences_units.ui
+++ b/desktop-widgets/preferences/preferences_units.ui
@@ -231,6 +231,43 @@
      </layout>
     </widget>
    </item>
+   <item>
+    <widget class="QGroupBox">
+     <property name="title">
+      <string>Duration units</string>
+     </property>
+     <layout class="QGridLayout">
+      <item row="0" column="0">
+       <widget class="QLabel" >
+        <property name="text">
+         <string>Show hours in duration</string>
+        </property>
+       </widget>
+      </item>
+      <item row="0" column="1">
+       <widget class="QRadioButton" name="duration_show_hours">
+        <property name="text">
+         <string>hh:mm (always)</string>
+        </property>
+       </widget>
+      </item>
+      <item row="1" column="1">
+       <widget class="QRadioButton" name="duration_no_hours">
+        <property name="text">
+         <string>mm (always)</string>
+        </property>
+       </widget>
+      </item>
+      <item row="2" column="1">
+       <widget class="QRadioButton" name="duration_mixed">
+        <property name="text">
+         <string>mm (for dives shorter than 1 hour), hh:mm (otherwise)</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </widget>
+   </item>
    <item>
     <widget class="QGroupBox" name="groupBox_11">
      <property name="title">