diff --git a/of/lib/src/main/java/org/projectfloodlight/openflow/protocol/XidGenerator.java b/of/lib/src/main/java/org/projectfloodlight/openflow/protocol/XidGenerator.java
new file mode 100644
index 0000000..2ee2764
--- /dev/null
+++ b/of/lib/src/main/java/org/projectfloodlight/openflow/protocol/XidGenerator.java
@@ -0,0 +1,5 @@
+package org.projectfloodlight.openflow.protocol;
+
+public interface XidGenerator {
+    long nextXid();
+}