diff --git a/docs/reference/variables.rst b/docs/reference/variables.rst
index a55057a0d..b57503a35 100644
--- a/docs/reference/variables.rst
+++ b/docs/reference/variables.rst
@@ -39,7 +39,7 @@ Security
 
     Maximum number of HTTP headers in the opening handshake.
 
-    The default value is ``128`` bytes.
+    The default value is ``128`` headers.
 
 .. envvar:: WEBSOCKETS_MAX_BODY_SIZE