diff --git a/src/main/java/net/onrc/onos/apps/proxyarp/IArpRequester.java b/src/main/java/net/onrc/onos/apps/proxyarp/IArpRequester.java
new file mode 100644
index 0000000..ddc0ab4
--- /dev/null
+++ b/src/main/java/net/onrc/onos/apps/proxyarp/IArpRequester.java
@@ -0,0 +1,24 @@
+package net.onrc.onos.apps.proxyarp;
+
+import java.net.InetAddress;
+
+import net.floodlightcontroller.util.MACAddress;
+
+/**
+ * Callback interface for modules using the {@link IProxyArpService} to send ARP
+ * requests.
+ *
+ */
+public interface IArpRequester {
+    /**
+     * Callback method that will be called by the {@link IProxyArpService} when
+     * it receives a reply for a request previously submitted by this
+     * {@code IArpRequester}.
+     *
+     * @param ipAddress
+     *        The IP address than an ARP request was sent for
+     * @param macAddress
+     *        The MAC address mapped to the requested IP address
+     */
+    public void arpResponse(InetAddress ipAddress, MACAddress macAddress);
+}