diff --git a/src/kernel/build.h b/src/kernel/build.h
index 7780a6cd2..b09dd8332 100644
--- a/src/kernel/build.h
+++ b/src/kernel/build.h
@@ -32,8 +32,6 @@ extern "C" {
      * wichtig
      */
 
-    struct xml_tag;
-
     typedef struct requirement {
         const struct resource_type *rtype;
         int number;
@@ -63,8 +61,8 @@ extern "C" {
     } construction;
 
     void free_construction(struct construction *cons);
-    extern int destroy_cmd(struct unit *u, struct order *ord);
-    extern int leave_cmd(struct unit *u, struct order *ord);
+    int destroy_cmd(struct unit *u, struct order *ord);
+    int leave_cmd(struct unit *u, struct order *ord);
 
     void build_road(struct unit *u, int size, direction_t d);
     void create_ship(struct unit *u, const struct ship_type *newtype,
@@ -74,16 +72,15 @@ extern "C" {
     struct building *getbuilding(const struct region *r);
     struct ship *getship(const struct region *r);
 
-    void reportevent(struct region *r, char *s);
-
     void shash(struct ship *sh);
     void sunhash(struct ship *sh);
-    extern int roqf_factor(void);
+    int roqf_factor(void);
 
     int build(struct unit *u, const construction * ctype, int completed, int want);
-    extern int maxbuild(const struct unit *u, const construction * cons);
-    extern struct message *msg_materials_required(struct unit *u,
-    struct order *ord, const struct construction *ctype, int multi);
+    int maxbuild(const struct unit *u, const construction * cons);
+    struct message *msg_materials_required(struct unit *u, struct order *ord,
+        const struct construction *ctype, int multi);
+
     /** error messages that build may return: */
 #define ELOWSKILL -1
 #define ENEEDSKILL -2