diff --git a/Source/scrollrt.h b/Source/scrollrt.h
index b83165d14..ac1a8431c 100644
--- a/Source/scrollrt.h
+++ b/Source/scrollrt.h
@@ -11,11 +11,8 @@ extern int PitchTbl[1024];
 extern BYTE *gpBufEnd;
 extern DWORD level_cel_block;
 extern char arch_draw_type;
-extern DDSURFACEDESC DDS_desc;
 extern int cel_transparency_active;
 extern int level_piece_id;
-extern void (*DrawPlrProc)(int, int, int, int, int, BYTE *, int, int, int, int);
-extern int draw_monster_num;
 #ifdef HELLFIRE
 extern BOOLEAN AutoMapShowItems;
 #endif
@@ -33,12 +30,4 @@ void EnableFrameCount();
 void scrollrt_draw_game_screen(BOOL draw_cursor);
 void DrawAndBlit();
 
-/* rdata */
-
-/* data */
-
-/** used in 1.00 debug */
-extern const char *const szMonModeAssert[18];
-extern const char *const szPlrModeAssert[12];
-
 #endif /* __SCROLLRT_H__ */