diff --git a/doc/architecture.txt b/doc/architecture.txt
index 8007d3f..19d1163 100644
--- a/doc/architecture.txt
+++ b/doc/architecture.txt
@@ -1,13 +1,13 @@
 = Architecture of uHub =
 
-uHub is single threaded and handles network and timer events using the 
+uHub is single-threaded and handles network and timer events using the
 libevent library.
 For each state there is a read event (and sometimes a write event) and timeout
 event in case an expected read (or write) event does not occur.
 
 
 == Protocol overview ==
-uHub use "speak" the ADC protocol, which works in short as follows:
+uHub "speaks" the ADC protocol, which works in short as follows:
 (C = client, S = server aka uHub).
 
 C: HSUP ADBASE
diff --git a/doc/extensions.txt b/doc/extensions.txt
index 7cfc0b3..a72b85e 100644
--- a/doc/extensions.txt
+++ b/doc/extensions.txt
@@ -31,7 +31,7 @@ The hub should send a packet containing the token back:
 'IECH {token} {host:port}', aswell as the same message via TCP.
 
 If the client receives the message via UDP, it should now be able to determine the type of NAT.
-If the client receives the message via TCP only it knows it has a firewall blocking icomming communication.
+If the client receives the message via TCP only it knows it has a firewall blocking incomming communication.
 If the client does not receive the message, it should assume a firewall is blocking all UDP communication,
 and resume in passive mode.