diff --git a/src/currency_core/blockchain_storage.cpp b/src/currency_core/blockchain_storage.cpp
index 88082943..f7d4e38a 100644
--- a/src/currency_core/blockchain_storage.cpp
+++ b/src/currency_core/blockchain_storage.cpp
@@ -74,8 +74,8 @@ using namespace currency;
 
 DISABLE_VS_WARNINGS(4267)
 
-const command_line::arg_descriptor<uint32_t>  arg_db_cache_l1       ( "db-cache-l1", "Specify size of memory mapped db cache file");
-const command_line::arg_descriptor<uint32_t>  arg_db_cache_l2       ( "db-cache-l2", "Specify cached elements in db helpers");
+const command_line::arg_descriptor<uint64_t>  arg_db_cache_l1       ( "db-cache-l1", "Specify size of memory mapped db cache file");
+const command_line::arg_descriptor<uint64_t>  arg_db_cache_l2       ( "db-cache-l2", "Specify cached elements in db helpers");
 
 //------------------------------------------------------------------
 blockchain_storage::blockchain_storage(tx_memory_pool& tx_pool) :m_db(nullptr, m_rw_lock),
diff --git a/src/currency_core/blockchain_storage.h b/src/currency_core/blockchain_storage.h
index 65dbc07a..cccc8d83 100644
--- a/src/currency_core/blockchain_storage.h
+++ b/src/currency_core/blockchain_storage.h
@@ -50,7 +50,7 @@ MARK_AS_POD_C11(macro_alias_1);
 #undef LOG_DEFAULT_CHANNEL 
 #define LOG_DEFAULT_CHANNEL "core"
 
-extern const command_line::arg_descriptor<uint32_t>      arg_db_cache_l2;
+extern const command_line::arg_descriptor<uint64_t>      arg_db_cache_l2;
 
 namespace currency
 {