diff --git a/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationView.java b/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationView.java
index ec6fe7ccd8..8330231ee5 100644
--- a/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationView.java
+++ b/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationView.java
@@ -161,8 +161,9 @@ public class DestinationView implements DestinationViewMBean {
     /**
      * @return the average size of a message (bytes)
      */
-    public double getAverageMessageSize() {
-        return destination.getDestinationStatistics().getMessageSize().getAverageSize();
+    public long getAverageMessageSize() {
+        // we are okay with the size without decimals so cast to long
+        return (long) destination.getDestinationStatistics().getMessageSize().getAverageSize();
     }
 
     /**
diff --git a/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationViewMBean.java b/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationViewMBean.java
index a42bcfa6d5..60340ffe81 100644
--- a/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationViewMBean.java
+++ b/activemq-broker/src/main/java/org/apache/activemq/broker/jmx/DestinationViewMBean.java
@@ -264,12 +264,11 @@ public interface DestinationViewMBean {
     @MBeanInfo("The shortest time a message has been held this destination.")
     long getMinEnqueueTime();
 
-
     @MBeanInfo("Average time a message has been held this destination.")
     double getAverageEnqueueTime();
 
     @MBeanInfo("Average message size on this destination")
-    double getAverageMessageSize();
+    long getAverageMessageSize();
 
     @MBeanInfo("Max message size on this destination")
     public long getMaxMessageSize();