avoid warnings
diff --git a/theta/include/theta_update_sketch_base_impl.hpp b/theta/include/theta_update_sketch_base_impl.hpp
index cb1bc2a..28c1f6e 100644
--- a/theta/include/theta_update_sketch_base_impl.hpp
+++ b/theta/include/theta_update_sketch_base_impl.hpp
@@ -141,8 +141,8 @@
template<typename EN, typename EK, typename A>
auto theta_update_sketch_base<EN, EK, A>::find(EN* entries, uint8_t lg_size, uint64_t key) -> std::pair<iterator, bool> {
- const size_t size = 1 << lg_size;
- const size_t mask = size - 1;
+ const uint32_t size = 1 << lg_size;
+ const uint32_t mask = size - 1;
const uint32_t stride = get_stride(key, lg_size);
uint32_t index = static_cast<uint32_t>(key) & mask;
// search for duplicate or zero
