diff --git a/10.md b/10.md
index dc324106..8b7bd573 100644
--- a/10.md
+++ b/10.md
@@ -10,7 +10,7 @@ On "e" and "p" tags in Text Events (kind 1).
 ## Abstract
 This NIP describes how to use "e" and "p" tags in text events, especially those that are replies to other text events.  It helps clients thread the replies into a tree rooted at the original event.
 
-##Positional "e" tags (DEPRECATED)
+## Positional "e" tags (DEPRECATED)
 >This scheme is in common use; but should be considered deprecated.
 
 `["e", <event-id> <relay-url>]`  as per NIP-01.