diff --git a/koha-tmpl/intranet-tmpl/prog/en/css/staff-global.css b/koha-tmpl/intranet-tmpl/prog/en/css/staff-global.css
index 27c13dc8e1..8dabe2c1b8 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/css/staff-global.css
+++ b/koha-tmpl/intranet-tmpl/prog/en/css/staff-global.css
@@ -126,6 +126,10 @@ em strong {
     font-style : italic;
 }
 
+.subfield-label span.subfield-code {
+    font-weight : bold;
+}
+
 #navmenulist li {
 	padding : .2em 0;
 	list-style-image : url("../../img/arrow-bullet.gif");
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/MARCdetail.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/MARCdetail.tt
index 2278514eb4..70b17df0e1 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/MARCdetail.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/MARCdetail.tt
@@ -81,7 +81,7 @@ function Changefwk(FwkList) {
             [% FOREACH subfiel IN tab0X.subfield %]
                 <p class="subfield_line">
                     <span class="subfield-label">&nbsp;
-                    [% UNLESS ( subfiel.hide_marc ) %]<b>[% subfiel.marc_subfield %]</b>[% END %]
+                    [% UNLESS ( subfiel.hide_marc ) %]<span class="subfield-code">[% subfiel.marc_subfield %]</span>[% END %]
                     <span class="desc" title="[% subfiel.long_desc %]">[% subfiel.short_desc %]</span></span>
                     [% IF ( subfiel.is_url ) %]<a href="[% subfiel.marc_value %]">[% subfiel.marc_value |html %]</a>[% ELSE %][% subfiel.marc_value |html %][% END %]
                     [% IF ( subfiel.link ) %]