diff --git a/libc/bionic/wchar.cpp b/libc/bionic/wchar.cpp
index 524ba07..e0879b9 100644
--- a/libc/bionic/wchar.cpp
+++ b/libc/bionic/wchar.cpp
@@ -230,13 +230,13 @@
   return wcsxfrm(dest, src, n);
 }
 
-long long wcstoll_l(const wchar_t *nptr, wchar_t **endptr, size_t base,
+long long wcstoll_l(const wchar_t *nptr, wchar_t **endptr, int base,
                     locale_t) {
   return wcstoll(nptr, endptr, base);
 }
 
 unsigned long long wcstoull_l(const wchar_t *nptr, wchar_t **endptr,
-                              size_t base, locale_t) {
+                              int base, locale_t) {
   return wcstoull(nptr, endptr, base);
 }