diff --git a/src/modules/butterflies/butterflies_main.h b/src/modules/butterflies/butterflies_main.h
index b122556e688a82b2b3c4920c31048254294828ad..e4d7655c3c9d7f81f3a04233e43708fc8b37a0c6 100644
--- a/src/modules/butterflies/butterflies_main.h
+++ b/src/modules/butterflies/butterflies_main.h
@@ -34,7 +34,6 @@ struct conf_data_butterflies {
 
     // fixme -> move to grid data;
 
-    int32_t current_generation;
     int32_t generations_max;
     int32_t generations_min;
     int32_t animal_dispersal_max_radius; ///< maximal flight/dispersal distance