diff --git a/libstdc++-v3/include/bits/codecvt.h b/libstdc++-v3/include/bits/codecvt.h
index f6e20f0649c..e6efa166109 100644
--- a/libstdc++-v3/include/bits/codecvt.h
+++ b/libstdc++-v3/include/bits/codecvt.h
@@ -763,7 +763,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
     public:
       explicit
-      codecvt_byname(const char* __s, size_t __refs = 0)
+      codecvt_byname(const char*, size_t __refs = 0)
       : codecvt<char16_t, char8_t, mbstate_t>(__refs) { }
 
       explicit
@@ -781,7 +781,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     {
     public:
       explicit
-      codecvt_byname(const char* __s, size_t __refs = 0)
+      codecvt_byname(const char*, size_t __refs = 0)
       : codecvt<char32_t, char8_t, mbstate_t>(__refs) { }
 
       explicit