pt-query-digest doesn't display time range on PS 5.7

On PS 5.6.25 the output of pt-query-digest slow.log (version 2.2.17) looks like this and includes the Time range

# 4.5s user time, 40ms system time, 41.48M rss, 223.34M vsz
# Current date: Tue Jun 21 00:41:31 2016
# Hostname: mute-base
# Files: /opt/mysql/dblogs1/svcmarketplace-p0/gen/slow.log
# Overall: 12.77k total, 226 unique, 0.00 QPS, 0.00x concurrency _________
# Time range: 2016-04-14 14:07:54 to 2016-06-21 00:39:08
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======

On PS 5.7.12 the output looks like this and does not include the Time range

# 16.2s user time, 50ms system time, 31.16M rss, 208.04M vsz
# Current date: Tue Jun 21 01:03:05 2016
# Hostname: cold-lake
# Files: /opt/mysql/dblogs1/svcmarketplace-p0/gen/slow.log
# Overall: 6.12k total, 18 unique, 0 QPS, 0x concurrency _________________
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======