diff --git a/src/gui/FWObjectPropertiesFactory.cpp b/src/gui/FWObjectPropertiesFactory.cpp
index 084e7960a..09e8d1980 100644
--- a/src/gui/FWObjectPropertiesFactory.cpp
+++ b/src/gui/FWObjectPropertiesFactory.cpp
@@ -100,7 +100,7 @@ QString FWObjectPropertiesFactory::getObjectProperties(FWObject *obj)
         {
             str <<  IPv6::cast(obj)->getAddressPtr()->toString().c_str();
             str << "/";
-            str << IPv6::cast(obj)->getNetmaskPtr()->toString().c_str();
+            str << QString("%1").arg(IPv6::cast(obj)->getNetmaskPtr()->getLength());
 
         } else if (physAddress::isA(obj))
         {
@@ -164,7 +164,7 @@ QString FWObjectPropertiesFactory::getObjectProperties(FWObject *obj)
             NetworkIPv6 *n=NetworkIPv6::cast(obj);
             str << n->getAddressPtr()->toString().c_str();
             str << "/";
-            str << n->getNetmaskPtr()->toString().c_str();
+            str << QString("%1").arg(n->getNetmaskPtr()->getLength());
 
         } else if (Group::cast(obj)!=NULL)   // just any group
         {
@@ -294,7 +294,7 @@ QString FWObjectPropertiesFactory::getObjectPropertiesDetailed(FWObject *obj,
             if (showPath && !tooltip) str += "<b>Path: </b>" + path + "<br>\n";
             str +=  IPv6::cast(obj)->getAddressPtr()->toString().c_str();
             str += "/";
-            str += IPv6::cast(obj)->getNetmaskPtr()->toString().c_str();
+            str += QString("%1").arg(IPv6::cast(obj)->getNetmaskPtr()->getLength());
         } else if (physAddress::isA(obj))
         {
             if (showPath && !tooltip) str += "<b>Path: </b>" + path + "<br>\n";
@@ -350,7 +350,7 @@ QString FWObjectPropertiesFactory::getObjectPropertiesDetailed(FWObject *obj,
             NetworkIPv6 *n=NetworkIPv6::cast(obj);
             str += n->getAddressPtr()->toString().c_str();
             str += "/";
-            str += n->getNetmaskPtr()->toString().c_str();
+            str += QString("%1").arg(n->getNetmaskPtr()->getLength());
         } else if (Group::cast(obj)!=NULL)   // just any group
         {
             if (showPath && !tooltip) str += "<b>Path: </b>" + path + "<br>\n";
diff --git a/src/gui/networkdialogipv6_q.ui b/src/gui/networkdialogipv6_q.ui
index 75a6d5f38..1931cbe5e 100644
--- a/src/gui/networkdialogipv6_q.ui
+++ b/src/gui/networkdialogipv6_q.ui
@@ -414,8 +414,8 @@
    <slot>changed()</slot>
    <hints>
     <hint type="sourcelabel" >
-     <x>20</x>
-     <y>20</y>
+     <x>101</x>
+     <y>75</y>
     </hint>
     <hint type="destinationlabel" >
      <x>20</x>
@@ -430,8 +430,8 @@
    <slot>changed()</slot>
    <hints>
     <hint type="sourcelabel" >
-     <x>20</x>
-     <y>20</y>
+     <x>101</x>
+     <y>127</y>
     </hint>
     <hint type="destinationlabel" >
      <x>20</x>
@@ -446,8 +446,8 @@
    <slot>changed()</slot>
    <hints>
     <hint type="sourcelabel" >
-     <x>20</x>
-     <y>20</y>
+     <x>307</x>
+     <y>71</y>
     </hint>
     <hint type="destinationlabel" >
      <x>20</x>
@@ -455,5 +455,21 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>netmask</sender>
+   <signal>textChanged(QString)</signal>
+   <receiver>NetworkDialogIPv6_q</receiver>
+   <slot>changed()</slot>
+   <hints>
+    <hint type="sourcelabel" >
+     <x>201</x>
+     <y>152</y>
+    </hint>
+    <hint type="destinationlabel" >
+     <x>180</x>
+     <y>-2</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
 </ui>