diff --git a/include/battle_transition.h b/include/battle_transition.h
index 0f583b101..db06a5638 100644
--- a/include/battle_transition.h
+++ b/include/battle_transition.h
@@ -7,7 +7,7 @@ void BattleTransition_Start(u8 transitionId);
 bool8 IsBattleTransitionDone(void);
 bool8 FldEff_Pokeball(void);
 void TransitionPhase1_Task_RunFuncs(u8 taskId);
-void GetBg0TilesDst(u16 **tilemap, u16 **tileset);
+void sub_8149F58(u16 **a0, u16 **a1);
 
 extern const struct SpritePalette gFieldEffectObjectPaletteInfo10;
 
diff --git a/src/unk_transition.c b/src/unk_transition.c
index b485ef350..09e194be3 100644
--- a/src/unk_transition.c
+++ b/src/unk_transition.c
@@ -185,11 +185,11 @@ static const TransitionStateFunc sPhase2_41_Funcs[] =
 // code
 static void sub_81DA700(void)
 {
-    u16 *tilemap, *tileset;
+    u16 *dst1, *dst2;
 
-    GetBg0TilesDst(&tilemap, &tileset);
-    LZ77UnCompVram(gUnknown_0862AD54, tileset);
-    LZ77UnCompVram(gUnknown_0862AF30, tilemap);
+    sub_8149F58(&dst1, &dst2);
+    LZ77UnCompVram(gUnknown_0862AD54, dst2);
+    LZ77UnCompVram(gUnknown_0862AF30, dst1);
     LoadPalette(gUnknown_0862B53C, 0xF0, 0x20);
     LoadCompressedSpriteSheet(&sUnknown_0862B724);
     LoadSpritePalette(&sUnknown_0862B72C);