diff --git a/src/micropolisj/engine/Micropolis.java b/src/micropolisj/engine/Micropolis.java
index 074ae07..3a3530a 100644
--- a/src/micropolisj/engine/Micropolis.java
+++ b/src/micropolisj/engine/Micropolis.java
@@ -1998,7 +1998,7 @@ public class Micropolis
 			for (int y = 0; y < DEFAULT_HEIGHT; y++)
 			{
 				int z = dis.readShort();
-				z &= ~(1024 | 2048 | 8192 | 16384); // clear ZONEBIT,ANIMBIT,BURNBIT,CONDBIT on import
+				z &= ~(1024 | 2048 | 4096 | 8192 | 16384); // clear ZONEBIT,ANIMBIT,BULLBIT,BURNBIT,CONDBIT on import
 				map[y][x] = (char) z;
 			}
 		}
@@ -2018,6 +2018,9 @@ public class Micropolis
 				if (isCombustible(z)) {
 					z |= 8192;   //synthesize BURNBIT on export
 				}
+				if (isDozeable(z)) {
+					z |= 4096;   //synthesize BULLBIT on export
+				}
 				if (isAnimated(z)) {
 					z |= 2048;   //synthesize ANIMBIT on export
 				}