diff --git a/src/hashset.hpp b/src/hashset.hpp
index 7acfa23f..d43628fd 100644
--- a/src/hashset.hpp
+++ b/src/hashset.hpp
@@ -75,6 +75,7 @@ public:
   int
   size(void)
   {
+    return str_set_size(&_str_set);
     return kh_size(_set);
   }