diff --git a/APPL/BEZ/loadPrkTerrein.asp b/APPL/BEZ/loadPrkTerrein.asp
index 9a2b0c8caa..b9f4606d6e 100644
--- a/APPL/BEZ/loadPrkTerrein.asp
+++ b/APPL/BEZ/loadPrkTerrein.asp
@@ -17,7 +17,7 @@ var useAsAjaxLoad = true;
 
 var locatie_key = getFParamInt("locatie_key");
 var next_vis = getFParamInt("next_vis");
-var prktype = getFParam("prktype");
+var prktype = getFParamSafe("prktype");
 var algwritelevel = getFParamInt("algwritelevel");