diff --git a/doc/api/http.markdown b/doc/api/http.markdown
index 2e4775398c68dc..afe7a086d9b29b 100644
--- a/doc/api/http.markdown
+++ b/doc/api/http.markdown
@@ -806,7 +806,7 @@ Just like `'end'`, this event occurs only once per response.
 
 The request/response headers object.
 
-Read only map of header names and values. Header names are lower-cased.
+Key-value pairs of header names and values. Header names are lower-cased.
 Example:
 
     // Prints something like: