1 files changed, 3 insertions, 7 deletions
diff --git a/src/wchar/mbrlen.c b/src/wchar/mbrlen.c
index 135a56b2..06caa81b 100644
--- a/src/wchar/mbrlen.c
+++ b/src/wchar/mbrlen.c
@@ -1,20 +1,16 @@
-#if 0
-
 #include <wchar.h>
+#include "_wchar.h"
 
 size_t mbrlen(const char * restrict s, size_t n, mbstate_t * restrict ps)
 {
-
+	static mbstate_t internal = {0};
 	SIGNAL_SAFE(0);
+	ASSERT_MBSTATE(ps, MBTOW, NULL, NULL);
 	/* TODO: overlap */
 
-	static mbstate_t internal = 0;
 	return mbrtowc(NULL, s, n, ps != NULL ? ps : &internal);
 }
 
 /*
 STDC(199409)
 */
-
-
-#endif