diff --git a/ccnx/ccnx-selectors.cpp b/ccnx/ccnx-selectors.cpp
index 510aaa9..3ce6144 100644
--- a/ccnx/ccnx-selectors.cpp
+++ b/ccnx/ccnx-selectors.cpp
@@ -11,7 +11,7 @@
           , m_minSuffixComps(-1)
           , m_answerOriginKind(AOK_DEFAULT)
           , m_interestLifetime(-1.0)
-          , m_scope(-1)
+          , m_scope(NO_SCOPE)
           , m_childSelector(DEFAULT)
 {
 }
@@ -32,7 +32,7 @@
           , m_minSuffixComps(-1)
           , m_answerOriginKind(AOK_DEFAULT)
           , m_interestLifetime(-1.0)
-          , m_scope(-1)
+          , m_scope(NO_SCOPE)
           , m_childSelector(DEFAULT)
 {
   if (pi != NULL)
@@ -54,7 +54,7 @@
       case 0x10: m_answerOriginKind = AOK_EXPIRE; break;
       default: break;
     }
-    m_scope = pi->scope;
+    m_scope = static_cast<Scope> (pi->scope);
     // scope and interest lifetime do not really matter to receiving application, it's only meaningful to routers
   }
 }
@@ -77,7 +77,7 @@
          && m_minSuffixComps == -1
          && m_answerOriginKind == AOK_DEFAULT
          && (m_interestLifetime - (-1.0)) < 10e-4
-         && m_scope == -1
+         && m_scope == NO_SCOPE
          && m_childSelector == DEFAULT;
 }
 
@@ -118,7 +118,7 @@
     ccn_charbuf_append_closer(cbuf); // <AnswerOriginKind>
   }
 
-  if (m_scope != -1)
+  if (m_scope != NO_SCOPE)
   {
     ccnb_tagged_putf(cbuf, CCN_DTAG_Scope, "%d", m_scope);
   }
diff --git a/ccnx/ccnx-selectors.h b/ccnx/ccnx-selectors.h
index a1125b9..3a04ff5 100644
--- a/ccnx/ccnx-selectors.h
+++ b/ccnx/ccnx-selectors.h
@@ -53,6 +53,14 @@
     DEFAULT = 2
   } CHILD_SELECTOR;
 
+  enum Scope
+    {
+      NO_SCOPE = -1,
+      SCOPE_LOCAL_CCND = 0,
+      SCOPE_LOCAL_HOST = 1,
+      SCOPE_NEXT_HOST = 2
+    };
+
   inline Selectors &
   maxSuffixComps(int maxSCs) {m_maxSuffixComps = maxSCs; return *this;}
 
@@ -66,7 +74,7 @@
   interestLifetime(double lifetime) {m_interestLifetime = lifetime; return *this;}
 
   inline Selectors &
-  scope(int scope) {m_scope = scope; return *this;}
+  scope(Scope scope) {m_scope = scope; return *this;}
 
   inline Selectors &
   childSelector(CHILD_SELECTOR child) {m_childSelector = child; return *this;}
@@ -89,7 +97,7 @@
   int m_minSuffixComps;
   AOK m_answerOriginKind;
   double m_interestLifetime;
-  int m_scope;
+  Scope m_scope;
   CHILD_SELECTOR m_childSelector;
   // not used now
   Bytes m_publisherPublicKeyDigest;