diff --git a/logger.cpp b/logger.cpp
index cae247a..aa04c7d 100644
--- a/logger.cpp
+++ b/logger.cpp
@@ -264,6 +264,9 @@ void Logger::logf(int level, const char *str, va_list valist)
 
 int logSslError(const char *str, size_t len, void *u)
 {
+    (void) len;
+    (void) u;
+
     Logger *logger = Logger::getInstance();
     logger->logf(LOG_ERR, str);
     return 0;