diff --git a/src/string/wcsncpy.c b/src/string/wcsncpy.c
index 0164208..fbd0631 100644
--- a/src/string/wcsncpy.c
+++ b/src/string/wcsncpy.c
@@ -3,7 +3,7 @@
 wchar_t *wcsncpy(wchar_t *d, const wchar_t *s, size_t n)
 {
 	wchar_t *a = d;
-	while (n && (*d++ = *s++)) n--;
+	while (n-- && (*d++ = *s++));
 	wmemset(d, 0, n);
 	return a;
 }