diff --git a/repertory/librepertory/include/types/repertory.hpp b/repertory/librepertory/include/types/repertory.hpp
index 1230b161..52bb2347 100644
--- a/repertory/librepertory/include/types/repertory.hpp
+++ b/repertory/librepertory/include/types/repertory.hpp
@@ -28,7 +28,7 @@ constexpr const auto default_download_timeout_ces{30U};
 constexpr const auto default_eviction_delay_mins{1U};
 constexpr const auto default_high_freq_interval_secs{30U};
 constexpr const auto default_low_freq_interval_secs{0U * 60U};
-constexpr const auto default_max_cache_size_bytes{
+constexpr const std::uint64_t default_max_cache_size_bytes{
     20UL * 1024UL * 1024UL * 1024UL,
 };
 constexpr const auto default_max_upload_count{5U};