diff --git a/etc/zebradb/marc_defs/unimarc/biblios/biblio-koha-indexdefs.xml b/etc/zebradb/marc_defs/unimarc/biblios/biblio-koha-indexdefs.xml
index b1f51aa926..5425bc2ba6 100644
--- a/etc/zebradb/marc_defs/unimarc/biblios/biblio-koha-indexdefs.xml
+++ b/etc/zebradb/marc_defs/unimarc/biblios/biblio-koha-indexdefs.xml
@@ -9,6 +9,9 @@
   <index_control_field tag="001">
     <target_index>Local-number:n</target_index>
   </index_control_field>
+  <index_control_field tag="001" zeropad="1">
+    <target_index>Local-number:s</target_index>
+  </index_control_field>
   <!--record.abs line 26: melm 009      Identifier-standard:w,Identifier-standard:n-->
   <index_control_field tag="009">
     <target_index>Identifier-standard:w</target_index>
diff --git a/etc/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl b/etc/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl
index 1459c293a5..22d902c461 100644
--- a/etc/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl
+++ b/etc/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl
@@ -51,6 +51,9 @@ definition file (probably something like {biblio,authority}-koha-indexdefs.xml)
     <z:index name="Local-number:n">
       <xslo:value-of select="."/>
     </z:index>
+    <z:index name="Local-number:s">
+      <xslo:value-of select="format-number(.,&quot;00000000000&quot;)"/>
+    </z:index>
   </xslo:template>
   <xslo:template match="marc:controlfield[@tag='009']">
     <z:index name="Identifier-standard:w">
diff --git a/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl b/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl
index 2bdbbf0da6..e12f73b192 100644
--- a/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl
+++ b/etc/zebradb/xsl/koha-indexdefs-to-zebra.xsl
@@ -225,6 +225,7 @@ definition file (probably something like {biblio,authority}-koha-indexdefs.xml)
     <xsl:template name="handle-one-index-control-field">
         <xsl:variable name="offset"><xsl:value-of select="@offset"/></xsl:variable>
         <xsl:variable name="length"><xsl:value-of select="@length"/></xsl:variable>
+        <xsl:variable name="zeropad"><xsl:value-of select="@zeropad"/></xsl:variable>
         <xsl:variable name="indexes">
             <xsl:call-template name="get-target-indexes"/>
         </xsl:variable>
@@ -240,6 +241,9 @@ definition file (probably something like {biblio,authority}-koha-indexdefs.xml)
                             <xsl:value-of select="$length"/>
                             <xsl:text>)</xsl:text>
                         </xsl:when>
+                        <xsl:when test="@zeropad">
+                            <xsl:text>format-number(.,"00000000000")</xsl:text>
+                        </xsl:when>
                         <xsl:otherwise>
                             <xsl:text>.</xsl:text>
                         </xsl:otherwise>