diff --git a/C4/Biblio.pm b/C4/Biblio.pm
index b0c7ad7bf1..a1005001e9 100644
--- a/C4/Biblio.pm
+++ b/C4/Biblio.pm
@@ -1074,13 +1074,15 @@ sub GetBiblio {
 sub GetBiblioItemInfosOf {
     my @biblioitemnumbers = @_;
 
-    my $query = '
+    my $biblioitemnumber_values = @biblioitemnumbers ? join( ',', @biblioitemnumbers ) : "''";
+
+    my $query = "
         SELECT biblioitemnumber,
             publicationyear,
             itemtype
         FROM biblioitems
-        WHERE biblioitemnumber IN (' . join( ',', @biblioitemnumbers ) . ')
-    ';
+        WHERE biblioitemnumber IN ($biblioitemnumber_values)
+    ";
     return get_infos_of( $query, 'biblioitemnumber' );
 }
 
diff --git a/C4/Items.pm b/C4/Items.pm
index 1781880095..6ab04e3345 100644
--- a/C4/Items.pm
+++ b/C4/Items.pm
@@ -1145,11 +1145,13 @@ sub GetItemsCount {
 sub GetItemInfosOf {
     my @itemnumbers = @_;
 
-    my $query = '
+    my $itemnumber_values = @itemnumbers ? join( ',', @itemnumbers ) : "''";
+
+    my $query = "
         SELECT *
         FROM items
-        WHERE itemnumber IN (' . join( ',', @itemnumbers ) . ')
-    ';
+        WHERE itemnumber IN ($itemnumber_values)
+    ";
     return get_infos_of( $query, 'itemnumber' );
 }