diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr32.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr32.java
index 4137dbcad4f..841533b5f52 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr32.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr32.java
@@ -11,12 +11,13 @@
  *******************************************************************************/
 package org.eclipse.cdt.utils;
 
+import java.io.Serializable;
 import java.math.BigInteger;
 
 import org.eclipse.cdt.core.IAddress;
 import org.eclipse.cdt.internal.core.Messages;
 
-public class Addr32 implements IAddress {
+public class Addr32 implements IAddress, Serializable {
 
 	private static final long MAX_ADDR = 0xffffffffL;
 	
diff --git a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr64.java b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr64.java
index f0e3ffe5ee6..ae550ca0dbf 100644
--- a/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr64.java
+++ b/core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/Addr64.java
@@ -11,12 +11,13 @@
  *******************************************************************************/
 package org.eclipse.cdt.utils;
 
+import java.io.Serializable;
 import java.math.BigInteger;
 
 import org.eclipse.cdt.core.IAddress;
 import org.eclipse.cdt.internal.core.Messages;
 
-public class Addr64 implements IAddress {
+public class Addr64 implements IAddress, Serializable {
 
 	public static final Addr64 ZERO = new Addr64("0"); //$NON-NLS-1$
 	public static final Addr64 MAX = new Addr64("ffffffffffffffff", 16); //$NON-NLS-1$