diff --git a/src/micropolisj/engine/Bulldozer.java b/src/micropolisj/engine/Bulldozer.java
index 7700031..29364e5 100644
--- a/src/micropolisj/engine/Bulldozer.java
+++ b/src/micropolisj/engine/Bulldozer.java
@@ -104,7 +104,7 @@ class Bulldozer extends ToolStroke
 				int tile = eff.getTile(xx,yy);
 				if (tile == CLEAR)
 					continue;
-				tile = tile & LOMASK;
+
 				if (tile != RADTILE && tile != DIRT) {
 					int z = inPreview ? 0 : city.PRNG.nextInt(3);
 					int nTile = TINYEXP + z;
diff --git a/src/micropolisj/engine/TerrainBehavior.java b/src/micropolisj/engine/TerrainBehavior.java
index 9e620be..79d6d34 100644
--- a/src/micropolisj/engine/TerrainBehavior.java
+++ b/src/micropolisj/engine/TerrainBehavior.java
@@ -339,8 +339,8 @@ class TerrainBehavior extends TileBehavior
 			int x = xpos + Dx[z];
 			int y = ypos + Dy[z];
 			if (city.testBounds(x,y)) {
-				if ((city.map[y][x] & LOMASK) == (fromTab[z] & LOMASK) ||
-					(city.map[y][x] == CHANNEL)
+				if ((city.getTile(x,y) == fromTab[z]) ||
+					(city.getTile(x,y) == CHANNEL)
 					) {
 					city.setTile(x, y, toTab[z]);
 				}