diff --git a/cataloguing/value_builder/unimarc_field_225a.pl b/cataloguing/value_builder/unimarc_field_225a.pl
index 53cdc6581c..d42aa63c43 100755
--- a/cataloguing/value_builder/unimarc_field_225a.pl
+++ b/cataloguing/value_builder/unimarc_field_225a.pl
@@ -81,9 +81,6 @@ sub plugin_javascript {
             var inputs = document.getElementsByTagName('input');
             
             for(var i=0 , len=inputs.length ; i \< len ; i++ ){
-                if(inputs[i].id.match(/^tag_010_subfield_a_.*/)){
-                    isbn_found = inputs[i].value;
-                }
                 if(inputs[i].id.match(/^tag_210_subfield_c_.*/)){
                     editor_found = inputs[i].value;
                 }