diff --git a/core/api/src/test/java/org/onosproject/net/optical/device/OmsPortHelperTest.java b/core/api/src/test/java/org/onosproject/net/optical/device/OmsPortHelperTest.java
index c8c68f4..6a309aa 100644
--- a/core/api/src/test/java/org/onosproject/net/optical/device/OmsPortHelperTest.java
+++ b/core/api/src/test/java/org/onosproject/net/optical/device/OmsPortHelperTest.java
@@ -91,7 +91,7 @@
         assertThat(oms.maxFrequency(), is(maxF));
         assertThat(oms.minFrequency(), is(minF));
         assertThat(oms.grid(), is(grid));
-        assertThat("(33-3)/2 = 15", oms.totalChannels(), is((short) 15));
+        assertThat("((33-3)/2)+1 = 16", oms.totalChannels(), is((short) 16));
     }
 
 }