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-rw-r--r--src/multibyte/mbrtowc.c3
-rw-r--r--src/multibyte/mbtowc.c3
2 files changed, 4 insertions, 2 deletions
diff --git a/src/multibyte/mbrtowc.c b/src/multibyte/mbrtowc.c
index 35e834ee..e7b36540 100644
--- a/src/multibyte/mbrtowc.c
+++ b/src/multibyte/mbrtowc.c
@@ -14,6 +14,7 @@ size_t mbrtowc(wchar_t *restrict wc, const char *restrict src, size_t n, mbstate
 	unsigned c;
 	const unsigned char *s = (const void *)src;
 	const unsigned N = n;
+	wchar_t dummy;
 
 	if (!st) st = (void *)&internal_state;
 	c = *(unsigned *)st;
@@ -21,7 +22,7 @@ size_t mbrtowc(wchar_t *restrict wc, const char *restrict src, size_t n, mbstate
 	if (!s) {
 		if (c) goto ilseq;
 		return 0;
-	} else if (!wc) wc = (void *)&wc;
+	} else if (!wc) wc = &dummy;
 
 	if (!n) return -2;
 	if (!c) {
diff --git a/src/multibyte/mbtowc.c b/src/multibyte/mbtowc.c
index 6710637a..803d2213 100644
--- a/src/multibyte/mbtowc.c
+++ b/src/multibyte/mbtowc.c
@@ -12,10 +12,11 @@ int mbtowc(wchar_t *restrict wc, const char *restrict src, size_t n)
 {
 	unsigned c;
 	const unsigned char *s = (const void *)src;
+	wchar_t dummy;
 
 	if (!s) return 0;
 	if (!n) goto ilseq;
-	if (!wc) wc = (void *)&wc;
+	if (!wc) wc = &dummy;
 
 	if (*s < 0x80) return !!(*wc = *s);
 	if (*s-SA > SB-SA) goto ilseq;