diff --git a/libc/bionic/locale.cpp b/libc/bionic/locale.cpp
index 4c3fd7f..ddb49ce 100644
--- a/libc/bionic/locale.cpp
+++ b/libc/bionic/locale.cpp
@@ -92,7 +92,7 @@
   g_locale.int_n_sign_posn = CHAR_MAX;
 }
 
-size_t __mb_cur_max() {
+size_t __ctype_get_mb_cur_max() {
   locale_t l = reinterpret_cast<locale_t>(pthread_getspecific(g_uselocale_key));
   if (l == nullptr || l == LC_GLOBAL_LOCALE) {
     return __bionic_current_locale_is_utf8 ? 4 : 1;
diff --git a/libc/include/stdlib.h b/libc/include/stdlib.h
index a5eb3d1..52f71dd 100644
--- a/libc/include/stdlib.h
+++ b/libc/include/stdlib.h
@@ -161,8 +161,8 @@
 extern int	wctomb(char *, wchar_t);
 extern size_t	wcstombs(char *, const wchar_t *, size_t);
 
-extern size_t __mb_cur_max(void);
-#define MB_CUR_MAX __mb_cur_max()
+extern size_t __ctype_get_mb_cur_max(void);
+#define MB_CUR_MAX __ctype_get_mb_cur_max()
 
 __END_DECLS