diff --git a/src/string/wcsncmp.c b/src/string/wcsncmp.c
index 1b159f41139f47f104f28b8570f9929732abb1b7..4ab32a924c4657dadd98677d4771042f120f43c8 100644
--- a/src/string/wcsncmp.c
+++ b/src/string/wcsncmp.c
@@ -2,6 +2,6 @@
 
 int wcsncmp(const wchar_t *l, const wchar_t *r, size_t n)
 {
-	for (; n && *l==*r && *l && *r; l++, r++);
+	for (; n && *l==*r && *l && *r; n--, l++, r++);
 	return n ? *l - *r : 0;
 }