diff --git a/src/common/communication.h b/src/common/communication.h
index 6966428b..c5ef24d1 100644
--- a/src/common/communication.h
+++ b/src/common/communication.h
@@ -165,11 +165,11 @@ void passthrough_event(boost::asio::local::stream_protocol::socket& socket,
     }
 
     void* data = std::visit(
-        overload{[&](std::nullptr_t) -> void* { return nullptr; },
-                 [&](std::string s) -> void* {
+        overload{[&](const std::nullptr_t&) -> void* { return nullptr; },
+                 [&](const std::string& s) -> void* {
                      return const_cast<char*>(s.c_str());
                  },
-                 [&](std::array<char, max_string_length> buffer) -> void* {
+                 [&](std::array<char, max_string_length>& buffer) -> void* {
                      return buffer.data();
                  }},
         event.payload);
diff --git a/src/common/logging.cpp b/src/common/logging.cpp
index e14d235d..77db395c 100644
--- a/src/common/logging.cpp
+++ b/src/common/logging.cpp
@@ -142,13 +142,16 @@ void Logger::log_event(bool is_dispatch,
                 << ", option = " << option << ", data = ";
 
         std::visit(
-            overload{[&](std::nullptr_t) { message << "<nullptr>"; },
-                     [&](std::string s) { message << "\"" << s << "\""; },
-                     [&](std::array<char, max_string_length>) {
-                         message << "<writeable_buffer>";
-                     }},
+            overload{
+                [&](const std::nullptr_t&) { message << "<nullptr>"; },
+                [&](const std::string& s) { message << "\"" << s << "\""; },
+                [&](const std::array<char, max_string_length>&) {
+                    message << "<writeable_buffer>";
+                }},
             payload);
 
+        message << ")";
+
         log(message.str());
     }
 }