diff --git a/APPL/Localscripts/FcltMgr.js b/APPL/Localscripts/FcltMgr.js
index 1e0fab0d3d..610b3888c5 100644
--- a/APPL/Localscripts/FcltMgr.js
+++ b/APPL/Localscripts/FcltMgr.js
@@ -571,9 +571,9 @@ var FcltMgr =
             $(frm).width(newWidth);
 
             if (FcltMgr.isTouchscreen())
-              $('iframe#fcltmodal'+FcltMgr._modalCount).dialog('option', 'position', 'top');
+              $('iframe#fcltmodal'+FcltMgr._modalCount).dialog('option', 'position', { my: "top", at: "top", of: window });
             else
-              $('iframe#fcltmodal'+FcltMgr._modalCount).dialog('option', 'position', 'center');
+              $('iframe#fcltmodal'+FcltMgr._modalCount).dialog('option', 'position', { my: "center", at: "center", of: window });
         },
 
         // Opent een modal dialoog in de huidige 'detailManager'