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-rw-r--r--libc/misc/wchar/wchar.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libc/misc/wchar/wchar.c b/libc/misc/wchar/wchar.c
index 7380ac9ae..ab6c617ed 100644
--- a/libc/misc/wchar/wchar.c
+++ b/libc/misc/wchar/wchar.c
@@ -286,6 +286,8 @@ size_t mbrtowc(wchar_t *__restrict pwc, const char *__restrict s,
s = empty_string;
n = 1;
} else if (*s == '\0') {
+ if (pwc)
+ *pwc = '\0';
/* According to the ISO C 89 standard this is the expected behaviour. */
return 0;
} else if (!n) {