diff --git a/root/usr/share/smanager/themes/default/templates/workgroup.html.ep b/root/usr/share/smanager/themes/default/templates/workgroup.html.ep
index 1698bce..7ef735e 100644
--- a/root/usr/share/smanager/themes/default/templates/workgroup.html.ep
+++ b/root/usr/share/smanager/themes/default/templates/workgroup.html.ep
@@ -24,7 +24,7 @@
 	<span class=label>
 	%=l 'wkg_LABEL_WORKGROUP', class => 'label'
 	</span><span class=data>
-	%= text_field 'Workgroup' =>  $wkg_datas->{Workgroup}, class => 'input'
+	%= text_field 'Workgroup' =>  $wkg_datas->{Workgroup}, class => 'input' , pattern=>".{1,15}", title=>"Limited to 15 characters by the NETBIOS"
 	</span>
 	</p>
 	<p>
@@ -63,4 +63,4 @@
     % end    
 
 </div>
-%end
+%end
\ No newline at end of file