diff --git a/vtm/src/org/oscim/utils/ScanBox.java b/vtm/src/org/oscim/utils/ScanBox.java
index fbe618a6..c2cb1f9e 100644
--- a/vtm/src/org/oscim/utils/ScanBox.java
+++ b/vtm/src/org/oscim/utils/ScanBox.java
@@ -116,20 +116,20 @@ public abstract class ScanBox {
         xmin = (int) min;
         xmax = (int) max;
 
-        // 🡐 top-right -> top-left
+        // top-right -> top-left
         ab.set(box[0], box[1], box[2], box[3]);
-        // 🡓 top-left ->  bottom-left
+        // top-left ->  bottom-left
         bc.set(box[2], box[3], box[4], box[5]);
-        // 🡕 bottom-left -> top-right
+        // bottom-left -> top-right
         ca.set(box[4], box[5], box[0], box[1]);
 
         scanTriangle();
 
-        // 🡗 top-right -> bottom-left
+        // top-right -> bottom-left
         ab.set(box[0], box[1], box[4], box[5]);
-        // 🡒 bottom-left -> bottom-right
+        // bottom-left -> bottom-right
         bc.set(box[4], box[5], box[6], box[7]);
-        // 🡑 bottom-right -> top-right
+        // bottom-right -> top-right
         ca.set(box[6], box[7], box[0], box[1]);
 
         scanTriangle();
@@ -154,7 +154,7 @@ public abstract class ScanBox {
             ca = t;
         }
 
-        // shouldnt be possible, anyway
+        // shouldn't be possible, anyway
         if (ca.dy == 0)
             return;