diff --git a/src/route/nexthop.hpp b/src/route/nexthop.hpp
index 0aa5640..265b151 100644
--- a/src/route/nexthop.hpp
+++ b/src/route/nexthop.hpp
@@ -113,6 +113,9 @@
   static const uint64_t HYPERBOLIC_COST_ADJUSTMENT_FACTOR = 1000;
 };
 
+bool
+operator==(const NextHop& lhs, const NextHop& rhs);
+
 std::ostream&
 operator<<(std::ostream& os, const NextHop& hop);