diff --git a/gflib/window.c b/gflib/window.c
index 6168e40830..b03b513dac 100644
--- a/gflib/window.c
+++ b/gflib/window.c
@@ -23,7 +23,7 @@ static u8 GetNumActiveWindowsOnBg8Bit(u8 bgId);
 
 static const struct WindowTemplate sDummyWindowTemplate = DUMMY_WIN_TEMPLATE;
 
-static void nullsub_8(void)
+static void DummyWindowBgTilemap(void)
 {
 
 }
@@ -42,7 +42,7 @@ bool16 InitWindows(const struct WindowTemplate *templates)
     {
         bgTilemapBuffer = GetBgTilemapBuffer(i);
         if (bgTilemapBuffer != NULL)
-            gWindowBgTilemapBuffers[i] = nullsub_8;
+            gWindowBgTilemapBuffers[i] = DummyWindowBgTilemap;
         else
             gWindowBgTilemapBuffers[i] = bgTilemapBuffer;
     }
@@ -84,11 +84,11 @@ bool16 InitWindows(const struct WindowTemplate *templates)
             }
         }
 
-        allocatedTilemapBuffer = AllocZeroed((u16)(WINDOWS_MAX * (templates[i].width * templates[i].height)));
+        allocatedTilemapBuffer = AllocZeroed((u16)(32 * (templates[i].width * templates[i].height)));
 
         if (allocatedTilemapBuffer == NULL)
         {
-            if ((GetNumActiveWindowsOnBg(bgLayer) == 0) && (gWindowBgTilemapBuffers[bgLayer] != nullsub_8))
+            if ((GetNumActiveWindowsOnBg(bgLayer) == 0) && (gWindowBgTilemapBuffers[bgLayer] != DummyWindowBgTilemap))
             {
                 Free(gWindowBgTilemapBuffers[bgLayer]);
                 gWindowBgTilemapBuffers[bgLayer] = allocatedTilemapBuffer;
@@ -127,7 +127,7 @@ u16 AddWindow(const struct WindowTemplate *template)
     }
 
     if (win == WINDOWS_MAX)
-        return 0xFF;
+        return WINDOW_NONE;
 
     bgLayer = template->bg;
     allocatedBaseBlock = 0;
@@ -137,7 +137,7 @@ u16 AddWindow(const struct WindowTemplate *template)
         allocatedBaseBlock = DummiedOutFireRedLeafGreenTileAllocFunc(bgLayer, 0, template->width * template->height, 0);
 
         if (allocatedBaseBlock == -1)
-            return 0xFF;
+            return WINDOW_NONE;
     }
 
     if (gWindowBgTilemapBuffers[bgLayer] == NULL)
@@ -149,7 +149,7 @@ u16 AddWindow(const struct WindowTemplate *template)
             allocatedTilemapBuffer = AllocZeroed(attrib);
 
             if (allocatedTilemapBuffer == NULL)
-                return 0xFF;
+                return WINDOW_NONE;
 
             for (i = 0; i < attrib; ++i)
                 allocatedTilemapBuffer[i] = 0;
@@ -159,16 +159,16 @@ u16 AddWindow(const struct WindowTemplate *template)
         }
     }
 
-    allocatedTilemapBuffer = AllocZeroed((u16)(WINDOWS_MAX * (template->width * template->height)));
+    allocatedTilemapBuffer = AllocZeroed((u16)(32 * (template->width * template->height)));
 
     if (allocatedTilemapBuffer == NULL)
     {
-        if ((GetNumActiveWindowsOnBg(bgLayer) == 0) && (gWindowBgTilemapBuffers[bgLayer] != nullsub_8))
+        if ((GetNumActiveWindowsOnBg(bgLayer) == 0) && (gWindowBgTilemapBuffers[bgLayer] != DummyWindowBgTilemap))
         {
             Free(gWindowBgTilemapBuffers[bgLayer]);
             gWindowBgTilemapBuffers[bgLayer] = allocatedTilemapBuffer;
         }
-        return 0xFF;
+        return WINDOW_NONE;
     }
 
     gWindows[win].tileData = allocatedTilemapBuffer;
@@ -196,7 +196,7 @@ int AddWindowWithoutTileMap(const struct WindowTemplate *template)
     }
 
     if (win == WINDOWS_MAX)
-        return 0xFF;
+        return WINDOW_NONE;
 
     bgLayer = template->bg;
     allocatedBaseBlock = 0;
@@ -206,7 +206,7 @@ int AddWindowWithoutTileMap(const struct WindowTemplate *template)
         allocatedBaseBlock = DummiedOutFireRedLeafGreenTileAllocFunc(bgLayer, 0, template->width * template->height, 0);
 
         if (allocatedBaseBlock == -1)
-            return 0xFF;
+            return WINDOW_NONE;
     }
 
     gWindows[win].window = *template;
@@ -233,10 +233,10 @@ void RemoveWindow(u8 windowId)
 
     if (GetNumActiveWindowsOnBg(bgLayer) == 0)
     {
-        if (gWindowBgTilemapBuffers[bgLayer] != nullsub_8)
+        if (gWindowBgTilemapBuffers[bgLayer] != DummyWindowBgTilemap)
         {
             Free(gWindowBgTilemapBuffers[bgLayer]);
-            gWindowBgTilemapBuffers[bgLayer] = 0;
+            gWindowBgTilemapBuffers[bgLayer] = NULL;
         }
     }
 
@@ -253,7 +253,7 @@ void FreeAllWindowBuffers(void)
 
     for (i = 0; i < NUM_BACKGROUNDS; ++i)
     {
-        if (gWindowBgTilemapBuffers[i] != NULL && gWindowBgTilemapBuffers[i] != nullsub_8)
+        if (gWindowBgTilemapBuffers[i] != NULL && gWindowBgTilemapBuffers[i] != DummyWindowBgTilemap)
         {
             Free(gWindowBgTilemapBuffers[i]);
             gWindowBgTilemapBuffers[i] = NULL;
@@ -448,16 +448,16 @@ void FillWindowPixelRect(u8 windowId, u8 fillValue, u16 x, u16 y, u16 width, u16
 void CopyToWindowPixelBuffer(u8 windowId, const void *src, u16 size, u16 tileOffset)
 {
     if (size != 0)
-        CpuCopy16(src, gWindows[windowId].tileData + (0x20 * tileOffset), size);
+        CpuCopy16(src, gWindows[windowId].tileData + (32 * tileOffset), size);
     else
-        LZ77UnCompWram(src, gWindows[windowId].tileData + (0x20 * tileOffset));
+        LZ77UnCompWram(src, gWindows[windowId].tileData + (32 * tileOffset));
 }
 
 // Sets all pixels within the window to the fillValue color.
 void FillWindowPixelBuffer(u8 windowId, u8 fillValue)
 {
     int fillSize = gWindows[windowId].window.width * gWindows[windowId].window.height;
-    CpuFastFill8(fillValue, gWindows[windowId].tileData, 0x20 * fillSize);
+    CpuFastFill8(fillValue, gWindows[windowId].tileData, 32 * fillSize);
 }
 
 #define MOVE_TILES_DOWN(a)                                                      \
@@ -599,7 +599,7 @@ static u8 GetNumActiveWindowsOnBg(u8 bgId)
     return windowsNum;
 }
 
-static void nullsub_9(void)
+static void DummyWindowBgTilemap8Bit(void)
 {
 
 }
@@ -616,9 +616,9 @@ u16 AddWindow8Bit(const struct WindowTemplate *template)
             break;
     }
     if (windowId == WINDOWS_MAX)
-        return 0xFF;
+        return WINDOW_NONE;
     bgLayer = template->bg;
-    if (gWindowBgTilemapBuffers[bgLayer] == 0)
+    if (gWindowBgTilemapBuffers[bgLayer] == NULL)
     {
         u16 attribute = GetBgAttribute(bgLayer, BG_ATTR_METRIC);
         if (attribute != 0xFFFF)
@@ -626,22 +626,22 @@ u16 AddWindow8Bit(const struct WindowTemplate *template)
             s32 i;
             memAddress = Alloc(attribute);
             if (memAddress == NULL)
-                return 0xFF;
+                return WINDOW_NONE;
             for (i = 0; i < attribute; i++) // if we're going to zero out the memory anyway, why not call AllocZeroed?
                 memAddress[i] = 0;
             gWindowBgTilemapBuffers[bgLayer] = memAddress;
             SetBgTilemapBuffer(bgLayer, memAddress);
         }
     }
-    memAddress = Alloc((u16)(0x40 * (template->width * template->height)));
+    memAddress = Alloc((u16)(64 * (template->width * template->height)));
     if (memAddress == NULL)
     {
-        if (GetNumActiveWindowsOnBg8Bit(bgLayer) == 0 && gWindowBgTilemapBuffers[bgLayer] != nullsub_9)
+        if (GetNumActiveWindowsOnBg8Bit(bgLayer) == 0 && gWindowBgTilemapBuffers[bgLayer] != DummyWindowBgTilemap8Bit)
         {
             Free(gWindowBgTilemapBuffers[bgLayer]);
             gWindowBgTilemapBuffers[bgLayer] = NULL;
         }
-        return 0xFF;
+        return WINDOW_NONE;
     }
     else
     {
@@ -656,7 +656,7 @@ void FillWindowPixelBuffer8Bit(u8 windowId, u8 fillValue)
     s32 i;
     s32 size;
 
-    size = (u16)(0x40 * (gWindows[windowId].window.width * gWindows[windowId].window.height));
+    size = (u16)(64 * (gWindows[windowId].window.width * gWindows[windowId].window.height));
     for (i = 0; i < size; i++)
         gWindows[windowId].tileData[i] = fillValue;
 }
@@ -691,7 +691,7 @@ void BlitBitmapRectToWindow4BitTo8Bit(u8 windowId, const u8 *pixels, u16 srcX, u
 void CopyWindowToVram8Bit(u8 windowId, u8 mode)
 {
     sWindowPtr = &gWindows[windowId];
-    sWindowSize = 0x40 * (sWindowPtr->window.width * sWindowPtr->window.height);
+    sWindowSize = 64 * (sWindowPtr->window.width * sWindowPtr->window.height);
 
     switch (mode)
     {
diff --git a/gflib/window.h b/gflib/window.h
index 6e26155c07..3eac75a280 100644
--- a/gflib/window.h
+++ b/gflib/window.h
@@ -37,6 +37,8 @@ struct WindowTemplate
     0,                              \
 }
 
+#define WINDOW_NONE 0xFF
+
 struct Window
 {
     struct WindowTemplate window;