Output change for TShark tcp.flags

The tshark output of -e tcp.flags has changed from '0x0018' to '18' at some point in the last few 1.10.x releases. Was this an expected change? Just not something that i would have expected to change outside of a major release. EG tshark -r "test.pcapng" -R "tcp.port eq 80" -Tfields -E header=y -E separator=, -e tcp.stream -e ip.src -e ip.dst -e tcp.srcport -e tcp.dstport -e tcp.flags -e tcp.analysis.ack_rtt

thanks tim