diff --git a/src/core/logdef.cpp b/src/core/logdef.cpp
index 507b967d..2adb7f44 100644
--- a/src/core/logdef.cpp
+++ b/src/core/logdef.cpp
@@ -38,9 +38,9 @@ static void SpdLog_CreateRotatingLoggers()
 
 #ifdef _TOOLS
 // NOTE: used for tools as additional file logger on top of the existing terminal logger.
-void SpdLog_InstallSupplementalLogger(const char* pszLoggerName, const char* pszLogFileName, const char* pszPattern)
+void SpdLog_InstallSupplementalLogger(const char* pszLoggerName, const char* pszLogFileName, const char* pszPattern, const bool bTruncate)
 {
-	g_SuppementalToolsLogger = spdlog::basic_logger_mt(pszLoggerName, pszLogFileName);
+	g_SuppementalToolsLogger = spdlog::basic_logger_mt(pszLoggerName, pszLogFileName, bTruncate);
 	g_SuppementalToolsLogger->set_pattern(pszPattern);
 }
 #endif // _TOOLS
diff --git a/src/core/logdef.h b/src/core/logdef.h
index 61b3f53e..0da40a4e 100644
--- a/src/core/logdef.h
+++ b/src/core/logdef.h
@@ -31,5 +31,6 @@ void SpdLog_Init(const bool bAnsiColor);
 void SpdLog_Shutdown(void);
 
 #ifdef _TOOLS
-void SpdLog_InstallSupplementalLogger(const char* pszLoggerName, const char* pszLogFileName, const char* pszPattern = "[%Y-%m-%d %H:%M:%S.%e] %v");
+void SpdLog_InstallSupplementalLogger(const char* pszLoggerName, const char* pszLogFileName,
+	const char* pszPattern = "[%Y-%m-%d %H:%M:%S.%e] %v", const bool bTruncate = true);
 #endif // _TOOLS