diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/common/impl/ControllerNodeToNodeId.java b/core/store/dist/src/main/java/org/onlab/onos/store/common/impl/ControllerNodeToNodeId.java
new file mode 100644
index 0000000..73187ee
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/common/impl/ControllerNodeToNodeId.java
@@ -0,0 +1,24 @@
+package org.onlab.onos.store.common.impl;
+
+import org.onlab.onos.cluster.ControllerNode;
+import org.onlab.onos.cluster.NodeId;
+
+import com.google.common.base.Function;
+
+/**
+ * Function to convert ControllerNode to NodeId.
+ */
+public final class ControllerNodeToNodeId
+    implements Function<ControllerNode, NodeId> {
+
+    private static final ControllerNodeToNodeId INSTANCE = new ControllerNodeToNodeId();
+
+    @Override
+    public NodeId apply(ControllerNode input) {
+        return input.id();
+    }
+
+    public static ControllerNodeToNodeId toNodeId() {
+        return INSTANCE;
+    }
+}