diff --git a/geau/R/map_so_ii.r b/geau/R/map_so_ii.r
index 43771ca1828e5f474d0806f10aef5c789b9d1423..b1edc391c566ed460827bf2e4f4b906dd86c4b4a 100644
--- a/geau/R/map_so_ii.r
+++ b/geau/R/map_so_ii.r
@@ -31,7 +31,7 @@
 map_so_ii = function(
     dataset,
     dataset_legend = NULL,
-    theme = c("none", "clc", "catnat", "hydro"),
+    theme = c("none", "clc", "catnat", "hydro", "population"),
     bar = TRUE,
     path = NULL,
     legend_theme = FALSE,