1 files changed, 2 insertions, 2 deletions
diff --git a/libcxx/include/support/xlocale/__posix_l_fallback.h b/libcxx/include/support/xlocale/__posix_l_fallback.h
index 8bf9567ffc2..c893a67313c 100644
--- a/libcxx/include/support/xlocale/__posix_l_fallback.h
+++ b/libcxx/include/support/xlocale/__posix_l_fallback.h
@@ -124,11 +124,11 @@ inline _LIBCPP_ALWAYS_INLINE int tolower_l(int c, locale_t) {
   return ::tolower(c);
 }
 
-inline _LIBCPP_ALWAYS_INLINE int towupper_l(int c, locale_t) {
+inline _LIBCPP_ALWAYS_INLINE wint_t towupper_l(wint_t c, locale_t) {
   return ::towupper(c);
 }
 
-inline _LIBCPP_ALWAYS_INLINE int towlower_l(int c, locale_t) {
+inline _LIBCPP_ALWAYS_INLINE wint_t towlower_l(wint_t c, locale_t) {
   return ::towlower(c);
 }