Index: src/main/java/ch/qos/logback/classic/spi/LoggingEvent.java
===================================================================
--- src/main/java/ch/qos/logback/classic/spi/LoggingEvent.java	(revision 1601)
+++ src/main/java/ch/qos/logback/classic/spi/LoggingEvent.java	(working copy)
@@ -284,7 +284,14 @@
   }
 
   private void writeObject(ObjectOutputStream out) throws IOException {
-    out.defaultWriteObject();
+	if(this.argumentArray!=null) {
+	    Object[] args=new Object[this.argumentArray.length];
+		for(int i=0;i<this.argumentArray.length;i++) {
+			args[i]=""+this.argumentArray[i];
+		}
+		this.argumentArray=args;
+	}
+	out.defaultWriteObject();
     out.writeInt(level.levelInt);
   }