diff --git a/ForumClient.markdown b/ForumClient.markdown
index 0b12137..ae732cd 100644
--- a/ForumClient.markdown
+++ b/ForumClient.markdown
@@ -22,7 +22,7 @@ The client identifer is random:
 
 If `author` is null, the post is anonymous and `signature` must also be null. Otherwise `author` is a list with two elements: `name` (string) and `public_key` (raw).
 
-If `signature` is null, the post is anonymous and `author` must also be null. Otherwise `signature` is a signature with `public_key` calculated over a list with four elements: `forum`, `author`, `content` and `timestamp` (int). `forum`, `author` and `content` are described above. `timestamp` is the timestamp from the [message header](BSP#message-format).
+If `signature` is null, the post is anonymous and `author` must also be null. Otherwise `signature` is a signature with `public_key`, calculated over a list with four elements: `forum`, `author`, `content` and `timestamp` (int). `forum`, `author` and `content` are described above. `timestamp` is the timestamp from the [message header](BSP#message-format).
 
 **4: ATTACHMENT** - The content is raw data.
 
@@ -33,7 +33,7 @@ If `signature` is null, the post is anonymous and `author` must also be null. Ot
 * An invitation is valid if it is well-formed.
 * A response is valid if it is well-formed and it references a valid invitation created by the opposite peer.
 * A departure is valid if it is well-formed and it references a valid invitation created by either peer.
-* A post is valid if it is well-formed, its parent (if any) is a valid post, and it is either anonymous or carries a valid signature over its content.
+* A post is valid if it is well-formed, its parent (if any) is a valid post, and it is either anonymous or carries a valid signature.
 * An attachment is always valid.
 
 Note that a post can be validated before its attachments have been received, and an attachment can be validated before it has been completely received.