style

diff --git a/http/Header/parse.md b/http/Header/parse.md
index 0db884c8ad005fc1932d44ab4b2f54d303953897..4e2c5a1620effd28bcec3a9f2cf2f62773c86def 100644 (file)
--- a/http/Header/parse.md
+++ b/http/Header/parse.md
@@ -1,4 +1,4 @@
-# static array http\Header::parse(string $header[, string $header_class = null])
+# static array http\Header::parse(string $header[, string $header_class = NULL])
 
 Parse HTTP headers.