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-rw-r--r--altoslib/AltosMag.java3
1 files changed, 2 insertions, 1 deletions
diff --git a/altoslib/AltosMag.java b/altoslib/AltosMag.java
index 1fa8877b..8784bb81 100644
--- a/altoslib/AltosMag.java
+++ b/altoslib/AltosMag.java
@@ -18,8 +18,9 @@
package org.altusmetrum.altoslib_5;
import java.util.concurrent.*;
+import java.io.*;
-public class AltosMag implements Cloneable {
+public class AltosMag implements Cloneable, Serializable {
public int along;
public int across;
public int through;