diff --git a/http/verb.hpp b/http/verb.hpp
index 33dd569..8eec68a 100644
--- a/http/verb.hpp
+++ b/http/verb.hpp
@@ -17,6 +17,14 @@
     Max,
 };
 
+static constexpr size_t maxVerbIndex = static_cast<size_t>(HttpVerb::Max) - 1U;
+
+// MaxVerb + 1 is designated as the "not found" verb.  It is done this way
+// to keep the BaseRule as a single bitfield (thus keeping the struct small)
+// while still having a way to declare a route a "not found" route.
+static constexpr const size_t notFoundIndex = maxVerbIndex + 1;
+static constexpr const size_t methodNotAllowedIndex = notFoundIndex + 1;
+
 inline std::optional<HttpVerb> httpVerbFromBoost(boost::beast::http::verb bv)
 {
     switch (bv)