diff --git a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl
index 152b0b5a76..2b0eca3be2 100644
--- a/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl
+++ b/koha-tmpl/opac-tmpl/bootstrap/en/xslt/MARC21slim2OPACDetail.xsl
@@ -319,7 +319,7 @@
                         </a>
                     </xsl:when>
                     <xsl:otherwise>
-                        <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=se,phr:"<xsl:value-of select="marc:subfield[@code='a']"/>"</xsl:attribute>
+                        <a><xsl:attribute name="href">/cgi-bin/koha/opac-search.pl?q=se,phr:"<xsl:value-of select="str:encode-uri(marc:subfield[@code='a'], true())"/>"</xsl:attribute>
                             <xsl:call-template name="chopPunctuation">
                                 <xsl:with-param name="chopString">
                                     <xsl:call-template name="subfieldSelect">