diff --git a/src/main/java/com/intel/jndn/utils/server/ServerBaseImpl.java b/src/main/java/com/intel/jndn/utils/server/ServerBaseImpl.java
index 54281e6..997aa64 100644
--- a/src/main/java/com/intel/jndn/utils/server/ServerBaseImpl.java
+++ b/src/main/java/com/intel/jndn/utils/server/ServerBaseImpl.java
@@ -72,7 +72,7 @@
    * @return true if the server has registered a prefix on the face
    */
   public boolean isRegistered() {
-    return registeredPrefixId == UNREGISTERED;
+    return registeredPrefixId != UNREGISTERED;
   }
 
   /**