diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/ill/ill-requests.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/ill/ill-requests.tt
index cc510fc16a..341715b52f 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/ill/ill-requests.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/ill/ill-requests.tt
@@ -362,7 +362,7 @@
                                 <input type="hidden" value="[% request.illrequest_id | html %]" name="illrequest_id">
                             </fieldset>
                             <fieldset class="action">
-                                <input type="submit" class="btn btn-default" value="Send email"/>
+                                <input type="submit" class="btn btn-primary" value="Send email"/>
                                 <span><a href="[% ill_url | url %]" title="Return to request details">Cancel</a></span>
                             </fieldset>
                         </form>