diff --git a/src/main/java/net/onrc/onos/ofcontroller/util/IPv4Net.java b/src/main/java/net/onrc/onos/ofcontroller/util/IPv4Net.java
index 52e6535..9ce247c 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/util/IPv4Net.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/util/IPv4Net.java
@@ -23,6 +23,17 @@
     }
 
     /**
+     * Copy constructor.
+     *
+     * @param other the object to copy from.
+     */
+    public IPv4Net(IPv4Net other) {
+	if (other.address != null)
+	    this.address = new IPv4(other.address);
+	this.prefixLen = other.prefixLen;
+    }
+
+    /**
      * Constructor for a given address and prefix length.
      *
      * @param address the address to use.