diff --git a/C4/XSLT.pm b/C4/XSLT.pm
index 125f887cb0..f69f9e72a3 100644
--- a/C4/XSLT.pm
+++ b/C4/XSLT.pm
@@ -251,6 +251,9 @@ sub XSLTParse4Display {
     my $variables    = $params->{xslt_variables};
     my $items_rs     = $params->{items_rs};
 
+    die "Mandatory \$params->{xsl_syspref} was not provided, called with biblionumber $params->{biblionumber}"
+        if not defined $params->{xsl_syspref};
+
     my $xslfilename = get_xsl_filename( $xslsyspref);
 
     # grab the XML, run it through our stylesheet, push it out to the browser
diff --git a/opac/opac-tags.pl b/opac/opac-tags.pl
index 63169e812a..515f4ccd2e 100755
--- a/opac/opac-tags.pl
+++ b/opac/opac-tags.pl
@@ -292,7 +292,7 @@ if ($loggedinuser) {
             {
                 biblionumber   => $tag->{biblionumber},
                 record         => $record,
-                xsl_filename   => 'OPACXSLTResultsDisplay',
+                xsl_syspref    => 'OPACXSLTResultsDisplay',
                 fix_amps       => 1,
                 hidden_items   => $hidden_items,
                 xslt_variables => $variables
diff --git a/virtualshelves/shelves.pl b/virtualshelves/shelves.pl
index d1ce868e4b..2cc09766cb 100755
--- a/virtualshelves/shelves.pl
+++ b/virtualshelves/shelves.pl
@@ -268,7 +268,7 @@ if ( $op eq 'view' ) {
                     {
                         biblionumber => $biblionumber,
                         record       => $record,
-                        xsl_filename => "XSLTListsDisplay",
+                        xsl_syspref  => 'XSLTListsDisplay',
                         fix_amps     => 1,
                     }
                 );