diff --git a/koha-tmpl/intranet-tmpl/prog/en/xslt/MARC21slim2intranetDetail.xsl b/koha-tmpl/intranet-tmpl/prog/en/xslt/MARC21slim2intranetDetail.xsl
index 29c124537b..0d40c3a8b6 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/xslt/MARC21slim2intranetDetail.xsl
+++ b/koha-tmpl/intranet-tmpl/prog/en/xslt/MARC21slim2intranetDetail.xsl
@@ -343,7 +343,7 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+not+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+NOT+(bib-level:a+OR+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
                 <xsl:attribute name="href">/cgi-bin/koha/catalogue/search.pl?q=ti,phr:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>
diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl
index a805ac2717..393846038d 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl
@@ -345,7 +345,7 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+and+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+AND+(bib-level:a+OR+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
                 <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=Host-item:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>
@@ -362,7 +362,7 @@
             <a>
             <xsl:choose>
             <xsl:when test="$UseControlNumber = '1' and marc:controlfield[@tag=001]">
-                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+not+(bib-level:a+or+bib-level:b)</xsl:attribute>
+                <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=rcn:<xsl:value-of select="str:encode-uri(marc:controlfield[@tag=001], true())"/>+NOT+(bib-level:a+OR+bib-level:b)</xsl:attribute>
             </xsl:when>
             <xsl:otherwise>
                 <xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=ti,phr:<xsl:value-of select="str:encode-uri(translate(marc:datafield[@tag=245]/marc:subfield[@code='a'], '/', ''), true())"/></xsl:attribute>