diff --git a/graph.cpp b/graph.cpp
index de5a9b93..257ecf60 100644
--- a/graph.cpp
+++ b/graph.cpp
@@ -4809,7 +4809,7 @@ EX void calcparam() {
   reset_projection();
   }
 
-function<void()> wrap_drawfullmap = drawfullmap;
+EX function<void()> wrap_drawfullmap = drawfullmap;
 
 bool force_sphere_outline = false;