diff --git a/core/api/src/main/java/org/onosproject/net/AnnotationKeys.java b/core/api/src/main/java/org/onosproject/net/AnnotationKeys.java
index 4101738..665565d 100644
--- a/core/api/src/main/java/org/onosproject/net/AnnotationKeys.java
+++ b/core/api/src/main/java/org/onosproject/net/AnnotationKeys.java
@@ -101,7 +101,7 @@
 
     /**
      * Annotation key for latency.
-     * The value of this key is expected to be latency in microsecond.
+     * The value of this key is expected to be latency in nanosecond.
      */
     public static final String LATENCY = "latency";