diff --git a/APPL/Shared/plaatsselector.inc b/APPL/Shared/plaatsselector.inc
index a7db8ed9e4..7a4a107aa5 100644
--- a/APPL/Shared/plaatsselector.inc
+++ b/APPL/Shared/plaatsselector.inc
@@ -673,7 +673,7 @@ function FCLTplaatsselector(alglevel, params)
       </tr>
 <%  }
     if (params.readonlylevel<5) {
-        var queryUrl = rooturl + "/appl/shared/suggest/SuggestRuimte.asp?autlevel=" + plevel
+        var queryUrl = rooturl + "/appl/shared/suggest/SuggestRuimte.asp?autlevel=" + (plevel||"")
                                + (params.filtercode? '&filtcode=' + params.filtercode : '');
         if (params.cadSelect && user.has("WEB_CADUSE"))
             queryUrl += "&cad=1";