diff --git a/src/common/logging.cpp b/src/common/logging.cpp
index 34cc3523..1bd95081 100644
--- a/src/common/logging.cpp
+++ b/src/common/logging.cpp
@@ -135,7 +135,7 @@ void Logger::log_event(bool is_dispatch,
                        int opcode,
                        int index,
                        intptr_t value,
-                       EventPayload payload,
+                       const EventPayload& payload,
                        float option) {
     if (BOOST_UNLIKELY(verbosity >= Verbosity::events)) {
         std::ostringstream message;
diff --git a/src/common/logging.h b/src/common/logging.h
index 22903654..79aef611 100644
--- a/src/common/logging.h
+++ b/src/common/logging.h
@@ -90,12 +90,11 @@ class Logger {
     void log_set_parameter_response();
     // If is_dispatch is true, then use opcode names from the plugin's dispatch
     // function. Otherwise use names for the host callback function opcodes.
-    // TODO: Cosnt references for both payloads
     void log_event(bool is_dispatch,
                    int opcode,
                    int index,
                    intptr_t value,
-                   EventPayload payload,
+                   const EventPayload& payload,
                    float option);
     void log_event_response(bool is_dispatch,
                             intptr_t return_value,