diff --git a/core/src/io/anuke/mindustry/editor/DrawOperation.java b/core/src/io/anuke/mindustry/editor/DrawOperation.java
index 49765644b5..bfa6b25673 100755
--- a/core/src/io/anuke/mindustry/editor/DrawOperation.java
+++ b/core/src/io/anuke/mindustry/editor/DrawOperation.java
@@ -30,6 +30,11 @@ public class DrawOperation{
     class TileOpStruct{
         short x;
         short y;
+        /**
+         * 0: floor
+         * 1: block
+         * 2: rotation
+         */
         byte type;
         byte from;
         byte to;
diff --git a/core/src/io/anuke/mindustry/editor/MapEditor.java b/core/src/io/anuke/mindustry/editor/MapEditor.java
index afa19d6f0e..9a2b2d427b 100644
--- a/core/src/io/anuke/mindustry/editor/MapEditor.java
+++ b/core/src/io/anuke/mindustry/editor/MapEditor.java
@@ -235,6 +235,12 @@ public class MapEditor{
         renderer.resize(width, height);
     }
 
+    public void changeFloor(int x, int y, Block to){
+        Block from = tiles[x][y].floor();
+        tiles[x][y].setFloor((Floor)to);
+        addTileOp(TileOp.get((short)x, (short)y, (byte)0, from.id, to.id));
+    }
+
     public void undo(){
         if(stack.canUndo()){
             stack.undo(this);