diff --git a/Source/debug.cpp b/Source/debug.cpp
index 325ef2bce..b8eaa4e74 100644
--- a/Source/debug.cpp
+++ b/Source/debug.cpp
@@ -25,18 +25,6 @@ void FreeDebugGFX()
 	MemFreeDbg(pSquareCel);
 }
 
-#ifdef _DEBUG
-void seed_desync_index_get()
-{
-	if (currlevel == 0) {
-		return;
-	}
-
-	update_seed_check = TRUE;
-	seed_index = level_seeds[currlevel];
-}
-#endif
-
 void CheckDungeonClear()
 {
 	int i, j;
diff --git a/Source/debug.h b/Source/debug.h
index 9038a8ad9..d8eecf07e 100644
--- a/Source/debug.h
+++ b/Source/debug.h
@@ -8,9 +8,6 @@ extern char dFlagDbg[NUMLEVELS][MAXDUNX][MAXDUNY];
 
 void LoadDebugGFX();
 void FreeDebugGFX();
-#ifdef _DEBUG
-void seed_desync_check(int seed);
-#endif
 void CheckDungeonClear();
 #ifdef _DEBUG
 void GiveGoldCheat();