diff --git a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/WallBlockingTilemap.java b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/WallBlockingTilemap.java
index db3fcb51f..76c447fbe 100644
--- a/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/WallBlockingTilemap.java
+++ b/core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/tiles/WallBlockingTilemap.java
@@ -139,7 +139,7 @@ public class WallBlockingTilemap extends Tilemap {
 			} else {
 				
 				//Block the side of an internal wall if:
-				//- the cell above, below, or the cell itself is visible
+				//- any cells above, the one directly below, or the cell itself is visible
 				//and all of the following are NOT true:
 				//- the cell has no neighbours on that side
 				//- the top-side neighbour is visible and the side neighbour isn't a wall.
@@ -149,6 +149,8 @@ public class WallBlockingTilemap extends Tilemap {
 				curr = BLOCK_NONE;
 				
 				if (!fogHidden(cell - mapWidth)
+						|| !fogHidden(cell - mapWidth - 1)
+						|| !fogHidden(cell - mapWidth + 1)
 						|| !fogHidden(cell)
 						|| !fogHidden(cell + mapWidth)) {