diff --git a/include/gtl/phmap.hpp b/include/gtl/phmap.hpp
index b496118..a9ce231 100644
--- a/include/gtl/phmap.hpp
+++ b/include/gtl/phmap.hpp
@@ -3955,7 +3955,7 @@ class parallel_hash_set {
 
     void reserve(size_t n) {
         size_t target     = GrowthToLowerboundCapacity(n);
-        size_t normalized = 16 * NormalizeCapacity(n / num_tables);
+        size_t normalized = num_tables * NormalizeCapacity(n / num_tables);
         rehash(normalized > target ? normalized : target);
     }