diff --git a/examples/pozyx_ready_to_localize/pozyx_ready_to_localize.pde b/examples/pozyx_ready_to_localize/pozyx_ready_to_localize.pde
index 1cd2a5b..b5abac8 100644
--- a/examples/pozyx_ready_to_localize/pozyx_ready_to_localize.pde
+++ b/examples/pozyx_ready_to_localize/pozyx_ready_to_localize.pde
@@ -138,7 +138,7 @@ void calculateAspectRatio(){
   for (PozyxDevice pozyxDevice : pozyxDevices){
     int[] pos = pozyxDevice.getCurrentPosition();
     max_width_mm = max(max_width_mm, pos[0]);
-    max_height_mm = max(max_height_mm, pos[0]);
+    max_height_mm = max(max_height_mm, pos[1]);
   }
   max_width_mm += 2*border; 
   max_height_mm += 2*border; 
@@ -223,4 +223,4 @@ void keyPressed() {
   // resets the scale to the current area taken by the devices. Useful if you moved too much outside of the anchor area.
   pixel_per_mm = 0.5;
   println("Resetting area size");  
-}
\ No newline at end of file
+}