diff --git a/C4/Items.pm b/C4/Items.pm
index 86bf024ad2..a5d932fedb 100644
--- a/C4/Items.pm
+++ b/C4/Items.pm
@@ -1026,35 +1026,43 @@ offset & size can be used to retrieve only a part of the whole listing (defaut b
 sub GetItemsForInventory {
     my ( $minlocation, $maxlocation,$location, $itemtype, $ignoreissued, $datelastseen, $branch, $offset, $size ) = @_;
     my $dbh = C4::Context->dbh;
+    my ( @bind_params, @where_strings );
 
     my $query = <<'END_SQL';
 SELECT items.itemnumber, barcode, itemcallnumber, title, author, biblio.biblionumber, datelastseen
 FROM items
   LEFT JOIN biblio ON items.biblionumber = biblio.biblionumber
   LEFT JOIN biblioitems on items.biblionumber = biblioitems.biblionumber
-WHERE itemcallnumber >= ?
-  AND itemcallnumber <= ?
 END_SQL
-    my @bind_params = ( $minlocation, $maxlocation );
+
+    if ($minlocation) {
+        push @where_strings, 'itemcallnumber >= ?';
+        push @bind_params, $minlocation;
+    }
+
+    if ($maxlocation) {
+        push @where_strings, 'itemcallnumber <= ?';
+        push @bind_params, $maxlocation;
+    }
 
     if ($datelastseen) {
         $datelastseen = format_date_in_iso($datelastseen);  
-        $query .= ' AND (datelastseen < ? OR datelastseen IS NULL) ';
+        push @where_strings, '(datelastseen < ? OR datelastseen IS NULL)';
         push @bind_params, $datelastseen;
     }
 
     if ( $location ) {
-        $query.= ' AND items.location = ? ';
+        push @where_strings, 'items.location = ?';
         push @bind_params, $location;
     }
     
     if ( $branch ) {
-        $query.= ' AND items.homebranch = ? ';
+        push @where_strings, 'items.homebranch = ?';
         push @bind_params, $branch;
     }
     
     if ( $itemtype ) {
-        $query.= ' AND biblioitems.itemtype = ? ';
+        push @where_strings, 'biblioitems.itemtype = ?';
         push @bind_params, $itemtype;
     }
     if ( $ignoreissued) {
diff --git a/tools/inventory.pl b/tools/inventory.pl
index c9c5a94d05..4fa9c94835 100755
--- a/tools/inventory.pl
+++ b/tools/inventory.pl
@@ -29,9 +29,9 @@ use C4::Koha;
 use C4::Branch; # GetBranches
 
 my $input = new CGI;
-my $minlocation=$input->param('minlocation') || 'A';
+my $minlocation=$input->param('minlocation') || '';
 my $maxlocation=$input->param('maxlocation');
-$maxlocation=$minlocation.'Z' unless $maxlocation;
+$maxlocation=$minlocation.'Z' unless ( $maxlocation || ! $minlocation );
 my $location=$input->param('location');
 my $itemtype=$input->param('itemtype');
 my $ignoreissued=$input->param('ignoreissued');