diff --git a/src/currency_core/blockchain_storage.cpp b/src/currency_core/blockchain_storage.cpp
index 53f28937..7c7831d5 100644
--- a/src/currency_core/blockchain_storage.cpp
+++ b/src/currency_core/blockchain_storage.cpp
@@ -3526,7 +3526,7 @@ uint64_t blockchain_storage::validate_alias_reward(const transaction& tx, const
   return true;
 }
 //------------------------------------------------------------------
-bool blockchain_storage::prevalidate_alias_info(const transaction& tx, extra_alias_entry& eae)
+bool blockchain_storage::prevalidate_alias_info(const transaction& tx, const extra_alias_entry& eae)
 {
   
   bool r = validate_alias_name(eae.m_alias);
diff --git a/src/currency_core/blockchain_storage.h b/src/currency_core/blockchain_storage.h
index 5f83c509..5dea7182 100644
--- a/src/currency_core/blockchain_storage.h
+++ b/src/currency_core/blockchain_storage.h
@@ -294,7 +294,7 @@ namespace currency
     i_core_event_handler* get_event_handler() const;
     uint64_t get_last_timestamps_check_window_median() const;
     uint64_t get_last_n_blocks_timestamps_median(size_t n) const;
-    bool prevalidate_alias_info(const transaction& tx, extra_alias_entry& eae);
+    bool prevalidate_alias_info(const transaction& tx, const extra_alias_entry& eae);
     bool validate_miner_transaction(const block& b, size_t cumulative_block_size, uint64_t fee, uint64_t& base_reward, const boost::multiprecision::uint128_t& already_generated_coins) const;
     performnce_data& get_performnce_data()const;
     bool validate_instance(const std::string& path);