diff --git a/apps/tetopology/api/src/main/java/org/onosproject/tetopology/management/api/link/TeLink.java b/apps/tetopology/api/src/main/java/org/onosproject/tetopology/management/api/link/TeLink.java
index 81d93c4..6827202 100644
--- a/apps/tetopology/api/src/main/java/org/onosproject/tetopology/management/api/link/TeLink.java
+++ b/apps/tetopology/api/src/main/java/org/onosproject/tetopology/management/api/link/TeLink.java
@@ -165,14 +165,14 @@
      *
      * @return the cost
      */
-    long cost();
+    Long cost();
 
     /**
      * Returns the link delay.
      *
      * @return the delay
      */
-    long delay();
+    Long delay();
 
     /**
      * Returns the link SRLG values.