diff --git a/cores/arduino/new.cpp b/cores/arduino/new.cpp
index 7ca493169..d88b711e6 100644
--- a/cores/arduino/new.cpp
+++ b/cores/arduino/new.cpp
@@ -56,7 +56,7 @@ void * operator new[](std::size_t size) {
   return operator new(size);
 }
 
-void * operator new(std::size_t size, const std::nothrow_t tag) noexcept {
+void * operator new(std::size_t size, const std::nothrow_t) noexcept {
 #if defined(NEW_TERMINATES_ON_FAILURE)
   // Cannot call throwing operator new as standard suggests, so call
   // new_helper directly then
@@ -65,7 +65,7 @@ void * operator new(std::size_t size, const std::nothrow_t tag) noexcept {
   return operator new(size);
 #endif
 }
-void * operator new[](std::size_t size, const std::nothrow_t& tag) noexcept {
+void * operator new[](std::size_t size, const std::nothrow_t&) noexcept {
 #if defined(NEW_TERMINATES_ON_FAILURE)
   // Cannot call throwing operator new[] as standard suggests, so call
   // malloc directly then
@@ -100,10 +100,10 @@ void operator delete[](void * ptr, std::size_t size) noexcept {
 }
 #endif // __cplusplus >= 201402L
 
-void operator delete(void* ptr, const std::nothrow_t& tag) noexcept {
+void operator delete(void* ptr, const std::nothrow_t&) noexcept {
   operator delete(ptr);
 }
-void operator delete[](void* ptr, const std::nothrow_t& tag) noexcept {
+void operator delete[](void* ptr, const std::nothrow_t&) noexcept {
   operator delete[](ptr);
 }