diff --git a/src/gsts3multipartuploader.cpp b/src/gsts3multipartuploader.cpp
index 8415435..bafc436 100644
--- a/src/gsts3multipartuploader.cpp
+++ b/src/gsts3multipartuploader.cpp
@@ -68,6 +68,10 @@ class Logger : public Aws::Utils::Logging::LogSystemInterface
         va_end (varargs);
     }
 
+    void vaLog(Aws::Utils::Logging::LogLevel logLevel, const char* tag, const char* formatStr, va_list args) override
+    {
+    }
+
     void LogStream(Aws::Utils::Logging::LogLevel log_level, const char* tag, const Aws::OStringStream &message_stream) override
     {
         Log(log_level, tag, "%s", message_stream.str().c_str());