diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonTileSheet.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonTileSheet.java
index 32b0930b5..a28a3b95f 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonTileSheet.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonTileSheet.java
@@ -271,10 +271,10 @@ public class DungeonTileSheet {
 	private static final int WALL_INTERNAL              = WALLS_INTERNAL+0;
 	private static final int WALL_INTERNAL_WOODEN       = WALLS_INTERNAL+16;
 
-	public static int stitchInternalWallTile(int tile, int right, int rightBelow, int leftBelow, int left){
+	public static int stitchInternalWallTile(int tile, int right, int rightBelow, int below, int leftBelow, int left){
 		int result;
 
-		if (tile == Terrain.BOOKSHELF)  result = WALL_INTERNAL_WOODEN;
+		if (tile == Terrain.BOOKSHELF || below == Terrain.BOOKSHELF)  result = WALL_INTERNAL_WOODEN;
 		else                            result = WALL_INTERNAL;
 
 		if (!wallStitcheable(right))        result += 1;
diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonWallsTilemap.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonWallsTilemap.java
index 445a0c636..12fe1b938 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonWallsTilemap.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/DungeonWallsTilemap.java
@@ -52,6 +52,7 @@ public class DungeonWallsTilemap extends DungeonTilemap {
 						tile,
 						(pos+1) % mapWidth != 0 ?                           map[pos + 1] : -1,
 						(pos+1) % mapWidth != 0 && pos + mapWidth < size ?  map[pos + 1 + mapWidth] : -1,
+						pos + mapWidth < size ?                             map[pos + mapWidth] : -1,
 						pos % mapWidth != 0 && pos + mapWidth < size ?      map[pos - 1 + mapWidth] : -1,
 						pos % mapWidth != 0 ?                               map[pos - 1] : -1
 				);