diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 13daa3c000..9f6c591749 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -679,7 +679,7 @@ OpenLayers.Map.prototype = {
         var valid = false;
         if (lonlat != null) {
             var maxExtent = this.getMaxExtent();
-            valid = maxExtent.contains(lonlat.lon, lonlat.lat);        
+            valid = maxExtent.containsLonLat(lonlat);        
         }
         return valid;
     },
diff --git a/lib/OpenLayers/Marker.js b/lib/OpenLayers/Marker.js
index 7e672f2cd6..e36661e336 100644
--- a/lib/OpenLayers/Marker.js
+++ b/lib/OpenLayers/Marker.js
@@ -82,7 +82,7 @@ OpenLayers.Marker.prototype = {
         var onScreen = false;
         if (this.map) {
             var screenBounds = this.map.getExtent();
-            onScreen = screenBounds.contains(this.lonlat.lon, this.lonlat.lat);
+            onScreen = screenBounds.containsLonLat(this.lonlat);
         }    
         return onScreen;
     },