diff --git a/openvpn/addr/addrspacesplit.hpp b/openvpn/addr/addrspacesplit.hpp
index f18628e2..bfebb213 100644
--- a/openvpn/addr/addrspacesplit.hpp
+++ b/openvpn/addr/addrspacesplit.hpp
@@ -53,7 +53,7 @@ class AddressSpaceSplitter : public RouteList
     }
 
   private:
-    enum Type
+    enum class Type
     {
         EQUAL,
         SUBROUTE,
@@ -72,7 +72,7 @@ class AddressSpaceSplitter : public RouteList
     {
         switch (find(in, route))
         {
-        case SUBROUTE:
+        case Type::SUBROUTE:
             {
                 Route r1, r2;
                 if (route.split(r1, r2))
@@ -84,8 +84,8 @@ class AddressSpaceSplitter : public RouteList
                     push_back(route);
                 break;
             }
-        case EQUAL:
-        case LEAF:
+        case Type::EQUAL:
+        case Type::LEAF:
             push_back(route);
             break;
         }
@@ -93,14 +93,14 @@ class AddressSpaceSplitter : public RouteList
 
     static Type find(const RouteList &in, const Route &route)
     {
-        Type type = LEAF;
+        Type type = Type::LEAF;
         for (RouteList::const_iterator i = in.begin(); i != in.end(); ++i)
         {
             const Route &r = *i;
             if (route == r)
-                type = EQUAL;
+                type = Type::EQUAL;
             else if (route.contains(r))
-                return SUBROUTE;
+                return Type::SUBROUTE;
         }
         return type;
     }