9 files changed, 10 insertions, 3 deletions
diff --git a/src/genworld.cpp b/src/genworld.cpp
index 5ef70655b..b4cab558b 100644
--- a/src/genworld.cpp
+++ b/src/genworld.cpp
@@ -62,6 +62,9 @@ ThreadMutex *_genworld_mapgen_mutex = ThreadMutex::New();
 /** Rights for the painting */
 ThreadMutex *_genworld_paint_mutex = ThreadMutex::New();
 
+/** Whether we are generating the map or not. */
+bool _generating_world;
+
 /**
  * Tells if the world generation is done in a thread or not.
  * @return the 'threaded' status
diff --git a/src/genworld.h b/src/genworld.h
index 6dd89e06e..e98b92cc1 100644
--- a/src/genworld.h
+++ b/src/genworld.h
@@ -98,5 +98,6 @@ void StartScenarioEditor();
 
 extern class ThreadMutex *_genworld_mapgen_mutex;
 extern class ThreadMutex *_genworld_paint_mutex;
+extern bool _generating_world;
 
 #endif /* GENWORLD_H */
diff --git a/src/industry_gui.cpp b/src/industry_gui.cpp
index b226c7f49..adfb8bd20 100644
--- a/src/industry_gui.cpp
+++ b/src/industry_gui.cpp
@@ -34,6 +34,7 @@
 #include "core/geometry_func.hpp"
 #include "core/random_func.hpp"
 #include "core/backup_type.hpp"
+#include "genworld.h"
 
 #include "table/strings.h"
 #include "table/sprites.h"
diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index 8c4fe36b0..b7eb461a9 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -48,6 +48,7 @@
 #include "core/alloc_type.hpp"
 #include "core/mem_func.hpp"
 #include "smallmap_gui.h"
+#include "genworld.h"
 
 #include "table/strings.h"
 #include "table/build_industry.h"
diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
index 4a80547c3..052594bbd 100644
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -27,6 +27,7 @@
 #include "town.h"
 #include "core/random_func.hpp"
 #include "sprite.h"
+#include "genworld.h"
 
 static BuildingCounts<uint32> _building_counts;
 static HouseClassMapping _class_mapping[HOUSE_CLASS_MAX];
diff --git a/src/road_cmd.cpp b/src/road_cmd.cpp
index 08536d710..6549f2047 100644
--- a/src/road_cmd.cpp
+++ b/src/road_cmd.cpp
@@ -37,6 +37,7 @@
 #include "core/random_func.hpp"
 #include "newgrf_railtype.h"
 #include "date_func.h"
+#include "genworld.h"
 
 #include "table/strings.h"
 
diff --git a/src/terraform_cmd.cpp b/src/terraform_cmd.cpp
index 424aa9f37..49b55ef04 100644
--- a/src/terraform_cmd.cpp
+++ b/src/terraform_cmd.cpp
@@ -17,6 +17,7 @@
 #include "variables.h"
 #include "functions.h"
 #include "economy_func.h"
+#include "genworld.h"
 
 #include "table/strings.h"
 
diff --git a/src/town_gui.cpp b/src/town_gui.cpp
index 05c3ed260..b845ec7bc 100644
--- a/src/town_gui.cpp
+++ b/src/town_gui.cpp
@@ -36,6 +36,7 @@
 #include "core/geometry_func.hpp"
 #include "station_base.h"
 #include "depot_base.h"
+#include "genworld.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"
diff --git a/src/variables.h b/src/variables.h
index 762c0a53e..1d63d02f9 100644
--- a/src/variables.h
+++ b/src/variables.h
@@ -19,7 +19,4 @@
 /* Amount of game ticks */
 VARDEF uint16 _tick_counter;
 
-/* IN/OUT parameters to commands */
-VARDEF bool _generating_world;
-
 #endif /* VARIABLES_H */