diff --git a/wrap/gl/pick.h b/wrap/gl/pick.h
index 70c6d90c..c8878491 100644
--- a/wrap/gl/pick.h
+++ b/wrap/gl/pick.h
@@ -26,6 +26,8 @@
 
 #include <vector>
 #include <algorithm>
+#include "gl_type_name.h"
+
 namespace vcg{
 
 template <class MESH_TYPE>