Wireshark-users: [Wireshark-users] tshark stop capturing after a certain amount of packets being

I am using tshark to capture packets: 

tshark -q

I want tshark to keep capturing but unfortunately it automatically stops
capturing after a short period of time:

debian:/home/worldamity# tshark -q 

Running as user "root" and group "root". This could be dangerous.

Capturing on eth0

36534 packets dropped

18707990 packets captured

do you have any idea how to fix this problem?