diff --git a/C4/Search.pm b/C4/Search.pm
index d92abe9276..172321292d 100644
--- a/C4/Search.pm
+++ b/C4/Search.pm
@@ -1573,7 +1573,7 @@ sub buildQuery {
                     $stemming = $auto_truncation = $weight_fields = $fuzzy_enabled = 0;
                 }
                 # ISBN,ISSN,Standard Number, don't need special treatment
-                elsif ( $index eq 'nb' || $index eq 'ns' ) {
+                elsif ( $index eq 'nb' || $index eq 'ns' || $index eq 'hi' ) {
                     (
                         $stemming,      $auto_truncation,
                         $weight_fields, $fuzzy_enabled