--- a/src/tunnelbridge_cmd.cpp	Wed Jun 11 15:08:52 2008 +0000
+++ b/src/tunnelbridge_cmd.cpp	Wed Jun 11 15:56:55 2008 +0000
@@ -1268,9 +1268,9 @@
 		if (CmdFailed(DoCommand(tile, 0, 0, DC_EXEC | DC_BANKRUPT, CMD_LANDSCAPE_CLEAR))) {
 			/* When clearing the bridge/tunnel failed there are still vehicles on/in
 			 * the bridge/tunnel. As all *our* vehicles are already removed, they
-			 * must be of another owner. Therefor this must be a road bridge/tunnel.
+			 * must be of another owner. Therefore this can't be rail tunnel/bridge.
 			 * In that case we can safely reassign the ownership to OWNER_NONE. */
-			assert(GetTunnelBridgeTransportType(tile) == TRANSPORT_ROAD);
+			assert(GetTunnelBridgeTransportType(tile) != TRANSPORT_RAIL);
 			SetTileOwner(tile, OWNER_NONE);
 		}
 	}

--- a/src/vehicle.cpp	Wed Jun 11 15:08:52 2008 +0000
+++ b/src/vehicle.cpp	Wed Jun 11 15:56:55 2008 +0000
@@ -206,7 +206,7 @@
 /** Procedure called for every vehicle found in tunnel/bridge in the hash map */
 static void *GetVehicleTunnelBridgeProc(Vehicle *v, void *data)
 {
-	if (v->type != VEH_TRAIN && v->type != VEH_ROAD) return NULL;
+	if (v->type != VEH_TRAIN && v->type != VEH_ROAD && v->type != VEH_SHIP) return NULL;
 
 	_error_message = VehicleInTheWayErrMsg(v);
 	return v;