diff --git a/trunk/doc/KAFKA-AGuideToTheKafkaProtocol-160915-0553-82964.pdf b/trunk/doc/kafka-160915-0553-82964.pdf
similarity index 100%
rename from trunk/doc/KAFKA-AGuideToTheKafkaProtocol-160915-0553-82964.pdf
rename to trunk/doc/kafka-160915-0553-82964.pdf
diff --git a/trunk/doc/readme.txt b/trunk/doc/readme.txt
index df8994d11..74baa6680 100644
--- a/trunk/doc/readme.txt
+++ b/trunk/doc/readme.txt
@@ -68,7 +68,7 @@ mp3.id3v2.3.0.pdf
     http://id3.org/id3v2.3.0
     
 kafka协议:
-KAFKA-AGuideToTheKafkaProtocol-160915-0553-82964.pdf
+kafka-160915-0553-82964.pdf
     https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol
 
 Winlin