diff --git a/src/mirror_maps/FT_remove_elements_outside_map.m b/src/mirror_maps/FT_remove_elements_outside_map.m
index 989f6e4941c1bcb8a35abb1f24bf084385f49ef3..30a43ab915621952a6e3766721d4115bb8b546ce 100644
--- a/src/mirror_maps/FT_remove_elements_outside_map.m
+++ b/src/mirror_maps/FT_remove_elements_outside_map.m
@@ -43,8 +43,8 @@ function [map] = FT_remove_elements_outside_map(map)
   D=2*radius;
   
   % Remove unnecessary points (nan points) outside the valid map grid.
-  Rx = round((ceil(D+4)/2));
-  Ry = round((ceil(D+4)/2));
+  Rx = round((ceil(D+6)/2));
+  Ry = round((ceil(D+6)/2));
   if 2*Ry<mygrid.ypoints && 2*Rx<mygrid.xpoints
     x0 = round(map.x0);
     y0 = round(map.y0);