diff --git a/lib/libc/locale/iswctype.c b/lib/libc/locale/iswctype.c
index ef6d4b567416..7e7b3b934b09 100644
--- a/lib/libc/locale/iswctype.c
+++ b/lib/libc/locale/iswctype.c
@@ -211,3 +211,13 @@ towupper(wc)
 {
         return (__toupper(wc));
 }
+
+#undef wcwidth
+int
+wcwidth(wc)
+        wchar_t wc;
+{
+	int width = (unsigned)__maskrune((wc), _CTYPE_SWM) >> _CTYPE_SWS;
+	return width ? width : iswprint(wc);
+}
+