diff -r c337d8c387f5 -r 377cc9bcfdaa src/net/java/otr4j/io/SerializationUtils.java
--- a/src/net/java/otr4j/io/SerializationUtils.java	Sun Jan 13 20:36:11 2013 +0100
+++ b/src/net/java/otr4j/io/SerializationUtils.java	Mon Jan 21 23:12:10 2013 +0100
@@ -75,7 +75,7 @@
 		OtrOutputStream oos = new OtrOutputStream(out);
 		oos.writeMysteriousT(t);
 		byte[] b = out.toByteArray();
-		out.close();
+		oos.close();
 		return b;
 	}
 
@@ -85,7 +85,7 @@
 		OtrOutputStream oos = new OtrOutputStream(out);
 		oos.writeData(b);
 		byte[] otrb = out.toByteArray();
-		out.close();
+		oos.close();
 		return otrb;
 	}