diff --git a/include/prototypes.h b/include/prototypes.h
index 17aa5eb3..8359a610 100644
--- a/include/prototypes.h
+++ b/include/prototypes.h
@@ -648,7 +648,7 @@ extern void age_levels(int);
 /* anno.c */
 extern void delete_old_announcements(void);
 /* bp.c */
-/* in budg.h */
+/* in update.h */
 /* deliver.c */
 extern void dodeliver(struct sctstr *);
 /* distribute.c */
diff --git a/include/budg.h b/include/update.h
similarity index 93%
rename from include/budg.h
rename to include/update.h
index a8aef7c3..41eab377 100644
--- a/include/budg.h
+++ b/include/update.h
@@ -24,18 +24,17 @@
  *
  *  ---
  *
- *  budg.h: Budget related definitions
+ *  update.h: Definitions related to the update
  *
  *  Known contributors to this file:
  *     Ville Virrankoski, 1995
  *     Markus Armbruster, 2004-2016
  */
 
-#ifndef BUDG_H
-#define BUDG_H
+#ifndef UPDATE_H
+#define UPDATE_H
 
-#include "types.h"
-#include "item.h"
+#include "sect.h"
 
 #define SCT_EFFIC (SCT_TYPE_MAX + 1)
 #define SCT_MAINT (SCT_TYPE_MAX + 2)
diff --git a/src/lib/commands/budg.c b/src/lib/commands/budg.c
index 7b205b3e..11c59825 100644
--- a/src/lib/commands/budg.c
+++ b/src/lib/commands/budg.c
@@ -36,11 +36,11 @@
 #include <config.h>
 
 #include <ctype.h>
-#include "budg.h"
 #include "commands.h"
 #include "item.h"
 #include "optlist.h"
 #include "product.h"
+#include "update.h"
 
 static void calc_all(int (*p_sect)[2], int *taxes, int *Ncivs,
 		     int *Nuws, int *bars, int *Nbars, int *mil,
diff --git a/src/lib/update/bp.c b/src/lib/update/bp.c
index 86991129..b2dcf941 100644
--- a/src/lib/update/bp.c
+++ b/src/lib/update/bp.c
@@ -41,9 +41,8 @@
 #include <config.h>
 
 #include <stdlib.h>
-#include "budg.h"
 #include "optlist.h"
-#include "sect.h"
+#include "update.h"
 
 /* Item types we want to track. */
 enum bp_item_idx {
diff --git a/src/lib/update/land.c b/src/lib/update/land.c
index 0bb5c00e..c2eaaad1 100644
--- a/src/lib/update/land.c
+++ b/src/lib/update/land.c
@@ -36,7 +36,6 @@
 #include <config.h>
 
 #include <math.h>
-#include "budg.h"
 #include "chance.h"
 #include "file.h"
 #include "land.h"
@@ -47,7 +46,7 @@
 #include "plague.h"
 #include "player.h"
 #include "prototypes.h"
-#include "sect.h"
+#include "update.h"
 
 static void landrepair(struct lndstr *, struct natstr *, struct bp *, int);
 static void upd_land(struct lndstr *, int, struct natstr *, struct bp *, int);
diff --git a/src/lib/update/main.c b/src/lib/update/main.c
index f6ed8cd5..2ea9aef2 100644
--- a/src/lib/update/main.c
+++ b/src/lib/update/main.c
@@ -36,7 +36,6 @@
 #include <config.h>
 
 #include <sys/resource.h>
-#include "budg.h"
 #include "empthread.h"
 #include "file.h"
 #include "game.h"
@@ -45,6 +44,7 @@
 #include "prototypes.h"
 #include "server.h"
 #include "unit.h"
+#include "update.h"
 
 int money[MAXNOC];
 int pops[MAXNOC];
diff --git a/src/lib/update/nat.c b/src/lib/update/nat.c
index ec31dec2..b0292420 100644
--- a/src/lib/update/nat.c
+++ b/src/lib/update/nat.c
@@ -35,13 +35,13 @@
 #include <config.h>
 
 #include <math.h>
-#include "budg.h"
 #include "file.h"
 #include "game.h"
 #include "item.h"
 #include "optlist.h"
 #include "prototypes.h"
 #include "nat.h"
+#include "update.h"
 
 /*
  * hap and edu avg mean that the weight on current happiness is
diff --git a/src/lib/update/plane.c b/src/lib/update/plane.c
index 7c80e342..2832c24c 100644
--- a/src/lib/update/plane.c
+++ b/src/lib/update/plane.c
@@ -34,7 +34,6 @@
 
 #include <config.h>
 
-#include "budg.h"
 #include "chance.h"
 #include "file.h"
 #include "lost.h"
@@ -43,8 +42,8 @@
 #include "plane.h"
 #include "player.h"
 #include "prototypes.h"
-#include "sect.h"
 #include "ship.h"
+#include "update.h"
 
 static void planerepair(struct plnstr *, struct natstr *, struct bp *, int);
 static void upd_plane(struct plnstr *, int, struct natstr *, struct bp *, int);
diff --git a/src/lib/update/prepare.c b/src/lib/update/prepare.c
index 3d6b6e68..6c0110cc 100644
--- a/src/lib/update/prepare.c
+++ b/src/lib/update/prepare.c
@@ -35,7 +35,6 @@
 
 #include <config.h>
 
-#include "budg.h"
 #include "chance.h"
 #include "file.h"
 #include "item.h"
@@ -44,8 +43,8 @@
 #include "optlist.h"
 #include "player.h"
 #include "prototypes.h"
-#include "sect.h"
 #include "ship.h"
+#include "update.h"
 
 void
 prepare_sects(int etu)
diff --git a/src/lib/update/produce.c b/src/lib/update/produce.c
index a7d7bae9..cc67ece1 100644
--- a/src/lib/update/produce.c
+++ b/src/lib/update/produce.c
@@ -32,14 +32,13 @@
 
 #include <config.h>
 
-#include "budg.h"
 #include "chance.h"
 #include "nat.h"
 #include "optlist.h"
 #include "player.h"
 #include "product.h"
 #include "prototypes.h"
-#include "sect.h"
+#include "update.h"
 
 static void materials_charge(struct pchrstr *, short *, int);
 
diff --git a/src/lib/update/sect.c b/src/lib/update/sect.c
index 4412831c..ac0a818e 100644
--- a/src/lib/update/sect.c
+++ b/src/lib/update/sect.c
@@ -34,7 +34,6 @@
 
 #include <config.h>
 
-#include "budg.h"
 #include "chance.h"
 #include "file.h"
 #include "item.h"
@@ -45,8 +44,8 @@
 #include "path.h"
 #include "player.h"
 #include "prototypes.h"
-#include "sect.h"
 #include "ship.h"
+#include "update.h"
 
 double
 buildeff(struct sctstr *sp)
diff --git a/src/lib/update/ship.c b/src/lib/update/ship.c
index e2d5213b..01fb8c9f 100644
--- a/src/lib/update/ship.c
+++ b/src/lib/update/ship.c
@@ -36,7 +36,6 @@
 #include <config.h>
 
 #include <math.h>
-#include "budg.h"
 #include "chance.h"
 #include "file.h"
 #include "land.h"
@@ -48,8 +47,8 @@
 #include "player.h"
 #include "product.h"
 #include "prototypes.h"
-#include "sect.h"
 #include "ship.h"
+#include "update.h"
 
 static void shiprepair(struct shpstr *, struct natstr *, struct bp *, int);
 static void upd_ship(struct shpstr *, int, struct natstr *, struct bp *, int);