diff --git a/include/code_800558C.h b/include/code_800558C.h
index e37d53e11..4dfbdd65b 100644
--- a/include/code_800558C.h
+++ b/include/code_800558C.h
@@ -8,7 +8,7 @@ extern s16 gUnknown_2026E4E;
 extern s16 *gWindowBgCopy;
 
 void sub_80057E8(void);
-void sub_8005838(s32 *, u8 kind);
+void CopyWindowBgBuffer(s32 *, u8 kind);
 void ToggleWindowBgBuffer(void);
 
 #endif // GUARD_CODE_800558C_H
diff --git a/src/code_800558C.c b/src/code_800558C.c
index 53adfd976..cc9ef5c48 100644
--- a/src/code_800558C.c
+++ b/src/code_800558C.c
@@ -102,7 +102,7 @@ void sub_80057E8(void)
 }
 
 // arm9.bin::02005758
-void sub_8005838(s32 *a0, u8 kind)
+void CopyWindowBgBuffer(s32 *a0, u8 kind)
 {
     const s16 *src1, *src2;
     s16 *dst;
diff --git a/src/debug_field_map.c b/src/debug_field_map.c
index f52afb58e..58e8e1d23 100644
--- a/src/debug_field_map.c
+++ b/src/debug_field_map.c
@@ -38,7 +38,7 @@ UNUSED static void DebugMapViewer(void)
     sub_809975C();
     sub_809D0AC();
     ResetDialogueBox();
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     AllocGroundMapAction();
     while (TRUE) {
         bool8 quitMapView;
@@ -48,7 +48,7 @@ UNUSED static void DebugMapViewer(void)
         if (DebugFieldMapWindow_Init()) {
             DebugFieldMapWindow_MoveMenuTo(mapId);
             while (TRUE) {
-                sub_8005838(NULL, 0);
+                CopyWindowBgBuffer(NULL, 0);
                 sub_8012A18(0);
                 switch (DebugFieldMapWindow_GetInput()) {
                     case MENU_INPUT_A_PRESS:
@@ -132,7 +132,7 @@ UNUSED static void DebugMapViewer(void)
             sub_809D25C();
             sub_80A59DC();
             DrawDialogueBoxString_Async();
-            sub_8005838(NULL, 0);
+            CopyWindowBgBuffer(NULL, 0);
             ToggleWindowBgBuffer();
             nullsub_8(gGameOptionsRef->touchScreen);
             sub_8005180();
diff --git a/src/dungeon_tilemap.c b/src/dungeon_tilemap.c
index 4b37021c4..07a702546 100644
--- a/src/dungeon_tilemap.c
+++ b/src/dungeon_tilemap.c
@@ -303,11 +303,11 @@ static void sub_803F7BC(void)
     u32 roomId = tile->room;
 
     if (strPtr->allTilesRevealed != 0 || strPtr->unk1820C != 0 || strPtr->unk18217 != 0) {
-        sub_8005838(NULL, 0);
+        CopyWindowBgBuffer(NULL, 0);
     }
     else if (roomId == CORRIDOR_ROOM) {
         u32 kind = (strPtr->visibilityRange == 2) ? 1 : 2;
-        sub_8005838(NULL, kind);
+        CopyWindowBgBuffer(NULL, kind);
     }
     else {
         s32 sp[4];
@@ -317,7 +317,7 @@ static void sub_803F7BC(void)
         sp[1] = room->unk10 - strPtr->cameraPixelPos.y;
         sp[2] = room->unk14 - strPtr->cameraPixelPos.x;
         sp[3] = room->unk18 - strPtr->cameraPixelPos.y;
-        sub_8005838(sp, 3);
+        CopyWindowBgBuffer(sp, 3);
     }
 }
 
diff --git a/src/dungeon_vram.c b/src/dungeon_vram.c
index bbcbcdf3a..b69d77d22 100644
--- a/src/dungeon_vram.c
+++ b/src/dungeon_vram.c
@@ -239,7 +239,7 @@ void sub_803E668(u32 unused)
     nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     nullsub_12();
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     ToggleWindowBgBuffer();
     gDungeonFramesCounter++;
     IncrementPlayTime(gPlayTimeRef);
diff --git a/src/friend_areas_map_util.c b/src/friend_areas_map_util.c
index 79d624119..cc35e4c17 100644
--- a/src/friend_areas_map_util.c
+++ b/src/friend_areas_map_util.c
@@ -373,7 +373,7 @@ void FriendAreasMap_RunFrameActions(void)
     SetBG3RegOffsets(gFriendAreasMapPtr->bgPos.x, gFriendAreasMapPtr->bgPos.y);
     AnimateSprites();
     UpdateAnimatedColors(FadeScreen(), gFriendAreasMapPtr->unk4C4C, 0xB0, 16, gFriendAreasMapPtr->brightness, NULL);
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     ToggleWindowBgBuffer();
diff --git a/src/ground_main.c b/src/ground_main.c
index e909a60e4..657c400f4 100644
--- a/src/ground_main.c
+++ b/src/ground_main.c
@@ -308,7 +308,7 @@ u32 xxx_script_related_8098468_Async(s32 startMode)
             GroundMap_ExecuteEvent(EVENT_DIVIDE, FALSE);
         }
         GroundMap_Action();
-        sub_8005838(NULL,0);
+        CopyWindowBgBuffer(NULL,0);
         ToggleWindowBgBuffer();
         xxx_call_update_bg_sound_input();
         while ( 1 ) {
diff --git a/src/main_loops.c b/src/main_loops.c
index 75920a8b4..79ec3f0aa 100644
--- a/src/main_loops.c
+++ b/src/main_loops.c
@@ -273,7 +273,7 @@ void GameLoop_Async(void)
 static void MainLoops_RunFrameActions(u32 unused)
 {
     DrawDialogueBoxString_Async();
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     nullsub_8(gGameOptionsRef->touchScreen);
 
     sub_8005180();
@@ -362,7 +362,7 @@ static void QuickSave_Async(u32 mode)
     sub_8099744();
     sub_8099750();
     SetCharacterMask(3);
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     ToggleWindowBgBuffer();
     CreateDialogueBoxAndPortrait(sSaveTextQuicksaving, 0, 0, 0x20);
 
diff --git a/src/other_menus1.c b/src/other_menus1.c
index 32b3a36a1..e0208e0b7 100644
--- a/src/other_menus1.c
+++ b/src/other_menus1.c
@@ -208,7 +208,7 @@ static void sub_80371B8(void)
 
 void sub_80373C4(void)
 {
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     ToggleWindowBgBuffer();
     WaitForNextFrameAndAdvanceRNG();
     LoadBufferedInputs();
diff --git a/src/textbox.c b/src/textbox.c
index 133dac807..6aebaf9e8 100644
--- a/src/textbox.c
+++ b/src/textbox.c
@@ -1040,10 +1040,10 @@ void sub_809B57C_Async(void)
     }
 
     if (sTextbox->unk434 < 0) {
-        sub_8005838(0, 0);
+        CopyWindowBgBuffer(0, 0);
     }
     else {
-        sub_8005838(0, 5);
+        CopyWindowBgBuffer(0, 5);
     }
 }
 
diff --git a/src/world_map.c b/src/world_map.c
index e2c80da90..85c8eb3a3 100644
--- a/src/world_map.c
+++ b/src/world_map.c
@@ -406,7 +406,7 @@ static void WorldMap_RunFrameActions(void)
     SetBG3RegOffsets(sWorldMapPtr->bgPos.x, sWorldMapPtr->bgPos.y);
     AnimateSprites(TRUE);
     FadeScreen();
-    sub_8005838(NULL, 0);
+    CopyWindowBgBuffer(NULL, 0);
     nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     ToggleWindowBgBuffer();