diff --git a/Source/diablo.h b/Source/diablo.h
index 19d9a6d13..42ede2f62 100644
--- a/Source/diablo.h
+++ b/Source/diablo.h
@@ -44,7 +44,6 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLi
 BOOL PressEscKey();
 LRESULT CALLBACK DisableInputWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
 LRESULT CALLBACK GM_Game(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
-void PressKey(int vkey);
 void LoadGameLevel(BOOL firstflag, int lvldir);
 void game_loop(BOOL bStartup);
 void diablo_color_cyc_logic();
diff --git a/Source/effects.h b/Source/effects.h
index 34662a51a..917aa6928 100644
--- a/Source/effects.h
+++ b/Source/effects.h
@@ -17,7 +17,6 @@ void PlayEffect(int i, int mode);
 void PlaySFX(int psfx);
 void PlaySfxLoc(int psfx, int x, int y);
 void sound_stop();
-void sfx_stop();
 void sound_update();
 void effects_cleanup_sfx();
 void sound_init();
diff --git a/Source/items.h b/Source/items.h
index a0c503c2f..2803c20c2 100644
--- a/Source/items.h
+++ b/Source/items.h
@@ -78,12 +78,10 @@ void GetItemFrm(int i);
 void GetItemStr(int i);
 void CheckIdentify(int pnum, int cii);
 void DoRepair(int pnum, int cii);
-void RepairItem(ItemStruct *i, int lvl);
 void DoRecharge(int pnum, int cii);
 #ifdef HELLFIRE
 void DoOil(int pnum, int cii);
 #endif
-void RechargeItem(ItemStruct *i, int r);
 void PrintItemPower(char plidx, ItemStruct *x);
 void DrawUniqueInfo();
 void PrintItemDetails(ItemStruct *x);
diff --git a/Source/monster.cpp b/Source/monster.cpp
index aed4872f1..1f848055d 100644
--- a/Source/monster.cpp
+++ b/Source/monster.cpp
@@ -2955,7 +2955,7 @@ void M_Teleport(int i)
 		return;
 #else
 		app_fatal("M_Teleport: Invalid monster %d", i);
-#endif;
+#endif
 
 	done = FALSE;
 
diff --git a/Source/pfile.h b/Source/pfile.h
index 81ac9eb4c..e826b4150 100644
--- a/Source/pfile.h
+++ b/Source/pfile.h
@@ -10,7 +10,6 @@ extern BOOL gbValidSaveFile;
 
 void pfile_init_save_directory();
 void pfile_write_hero();
-void pfile_flush(BOOL is_single_player, DWORD save_num);
 BOOL pfile_create_player_description(char *dst, DWORD len);
 BOOL pfile_rename_hero(const char *name_1, const char *name_2);
 void pfile_flush_W();
diff --git a/Source/sync.h b/Source/sync.h
index c667998a9..945c218d4 100644
--- a/Source/sync.h
+++ b/Source/sync.h
@@ -8,7 +8,6 @@
 
 DWORD sync_all_monsters(const BYTE *pbBuf, DWORD dwMaxLen);
 DWORD sync_update(int pnum, const BYTE *pbBuf);
-void sync_monster(int pnum, const TSyncMonster *p);
 void sync_init();
 
 #endif /* __SYNC_H__ */