diff --git a/lib/logger/logger.h b/lib/logger/logger.h
index 142da9a..90fbc4e 100644
--- a/lib/logger/logger.h
+++ b/lib/logger/logger.h
@@ -73,7 +73,7 @@ namespace Logger {
   };
   struct debug_logger {
     template<class T>
-    debug_logger &operator<<(T val) {
+    debug_logger &operator<<([[maybe_unused]] T val) {
     #ifdef PRINT_DEBUG
       std::cout << val;
     #endif