diff --git a/contrib/epee/include/storages/portable_storage_val_converters.h b/contrib/epee/include/storages/portable_storage_val_converters.h
index f2c49f0e..8e38beeb 100644
--- a/contrib/epee/include/storages/portable_storage_val_converters.h
+++ b/contrib/epee/include/storages/portable_storage_val_converters.h
@@ -129,7 +129,7 @@ POP_VS_WARNINGS
     template<typename from_type, typename to_type>
     struct convert_to_integral<from_type, to_type, false>
     {
-      static void convert(const const std::string& from, uint64_t& to)
+      static void convert(const std::string& from, uint64_t& to)
       {
         //attempt to convert string to unsigned int
         try