diff --git a/asterisk/manager.py b/asterisk/manager.py
index ea46359..dc3cea3 100644
--- a/asterisk/manager.py
+++ b/asterisk/manager.py
@@ -466,6 +466,7 @@ def connect(self, host, port=5038, buffer_size=0):
         assert type(host) is str
 
         port = int(port)  # make sure port is an int
+        buffer_size = int(buffer_size)  # make sure buffer_siz is an int as well
 
         # create our socket and connect
         try: