diff --git a/navalplanner-webapp/src/main/webapp/resources/criterions/_edition.zul b/navalplanner-webapp/src/main/webapp/resources/criterions/_edition.zul
index f4d9616af..699032c6a 100644
--- a/navalplanner-webapp/src/main/webapp/resources/criterions/_edition.zul
+++ b/navalplanner-webapp/src/main/webapp/resources/criterions/_edition.zul
@@ -27,8 +27,8 @@
   </checkbox>
  </hbox>
  <hbox>
-  <button onClick="controller.save();" label="${arg.save_button_label}" />
+  <button onClick="controller.save();" label="${arg.save_button_label}" sclass="main-button"/>
   <button onClick="controller.cancel();"
-   label="${arg.cancel_button_label}" />
+   label="${arg.cancel_button_label}" sclass="main-button"/>
  </hbox>
 </vbox>
diff --git a/navalplanner-webapp/src/main/webapp/resources/worker/_editWorkRelationship.zul b/navalplanner-webapp/src/main/webapp/resources/worker/_editWorkRelationship.zul
index 8813de4a8..628c7b8f5 100644
--- a/navalplanner-webapp/src/main/webapp/resources/worker/_editWorkRelationship.zul
+++ b/navalplanner-webapp/src/main/webapp/resources/worker/_editWorkRelationship.zul
@@ -41,7 +41,7 @@
         </rows>
       </grid>
     <button onClick="workRelationship.saveCriterionSatisfaction();"
-        label="${i18n:_('Save')}" />
+        label="${i18n:_('Save')}" sclass="main-button"/>
     <button onClick="controller.goToEditForm()"
-        label="${i18n:_('Cancel and return')}"/>
+        label="${i18n:_('Cancel and return')}" sclass="main-button" />
 </window>