diff --git a/silkworm/silkrpc/json/types.hpp b/silkworm/silkrpc/json/types.hpp
index 9dddf57be4..86f3ca9b83 100644
--- a/silkworm/silkrpc/json/types.hpp
+++ b/silkworm/silkrpc/json/types.hpp
@@ -81,7 +81,7 @@ void to_json(nlohmann::json& json, const BlockHeader& ommer);
 
 namespace silkworm::rpc {
 
-static constexpr std::string_view jsonVersion{"2.0"};
+inline constexpr std::string_view jsonVersion{"2.0"};
 inline constexpr auto jsonVersionSize = 8;
 inline constexpr auto addressSize = 64;
 inline constexpr auto hashSize = 128;