diff --git a/src/micropolisj/engine/MapScanner.java b/src/micropolisj/engine/MapScanner.java
index aed4b23..a8cba4c 100644
--- a/src/micropolisj/engine/MapScanner.java
+++ b/src/micropolisj/engine/MapScanner.java
@@ -87,7 +87,7 @@ class MapScanner
 				return;
 			}
 
-			if (cchr9 >= SOMETINYEXP && cchr9 <= LASTTINYEXP)
+			if (isTinyExplosion(cchr))
 			{
 				// clear AniRubble
 				city.setTile(xpos, ypos, (char)(RUBBLE + PRNG.nextInt(4) + BULLBIT));
diff --git a/src/micropolisj/engine/TileConstants.java b/src/micropolisj/engine/TileConstants.java
index 63706ee..91539f3 100644
--- a/src/micropolisj/engine/TileConstants.java
+++ b/src/micropolisj/engine/TileConstants.java
@@ -341,6 +341,12 @@ public class TileConstants
 			((cell & LOMASK) <= LASTRUBBLE));
 	}
 
+	public static boolean isTinyExplosion(int tile)
+	{
+		int tmp = tile & LOMASK;
+		return (tmp >= SOMETINYEXP && tmp <= LASTTINYEXP);
+	}
+
 	public static boolean isTree(char cell)
 	{
 		return (((cell & LOMASK) >= WOODS_LOW) &&