diff --git a/doc/mlr.1 b/doc/mlr.1
index b55a95a57..e87a4e818 100644
--- a/doc/mlr.1
+++ b/doc/mlr.1
@@ -2,12 +2,12 @@
 .\"     Title: mlr
 .\"    Author: [see the "AUTHOR" section]
 .\" Generator: ./mkman.rb
-.\"      Date: 2018-04-29
+.\"      Date: 2018-08-26
 .\"    Manual: \ \&
 .\"    Source: \ \&
 .\"  Language: English
 .\"
-.TH "MILLER" "1" "2018-04-29" "\ \&" "\ \&"
+.TH "MILLER" "1" "2018-08-26" "\ \&" "\ \&"
 .\" -----------------------------------------------------------------
 .\" * Portability definitions
 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -182,18 +182,18 @@ output separator to the given value.
 .\}
 .nf
  + + - - * / // .+ .+ .- .- .* ./ .// % ** | ^ & ~ << >> bitcount == != =~ !=~
- > >= < <= && || ^^ ! ? : . gsub strlen sub ssub substr tolower toupper abs
- acos acosh asin asinh atan atan2 atanh cbrt ceil cos cosh erf erfc exp expm1
- floor invqnorm log log10 log1p logifit madd max mexp min mmul msub pow qnorm
- round roundm sgn sin sinh sqrt tan tanh urand urand32 urandint dhms2fsec
- dhms2sec fsec2dhms fsec2hms gmt2sec localtime2sec hms2fsec hms2sec sec2dhms
- sec2gmt sec2gmt sec2gmtdate sec2localtime sec2localtime sec2localdate sec2hms
- strftime strftime_local strptime strptime_local systime is_absent is_bool
- is_boolean is_empty is_empty_map is_float is_int is_map is_nonempty_map
- is_not_empty is_not_map is_not_null is_null is_numeric is_present is_string
- asserting_absent asserting_bool asserting_boolean asserting_empty
- asserting_empty_map asserting_float asserting_int asserting_map
- asserting_nonempty_map asserting_not_empty asserting_not_map
+ > >= < <= && || ^^ ! ? : . gsub regex_extract strlen sub ssub substr tolower
+ toupper abs acos acosh asin asinh atan atan2 atanh cbrt ceil cos cosh erf erfc
+ exp expm1 floor invqnorm log log10 log1p logifit madd max mexp min mmul msub
+ pow qnorm round roundm sgn sin sinh sqrt tan tanh urand urand32 urandint
+ dhms2fsec dhms2sec fsec2dhms fsec2hms gmt2sec localtime2sec hms2fsec hms2sec
+ sec2dhms sec2gmt sec2gmt sec2gmtdate sec2localtime sec2localtime sec2localdate
+ sec2hms strftime strftime_local strptime strptime_local systime is_absent
+ is_bool is_boolean is_empty is_empty_map is_float is_int is_map
+ is_nonempty_map is_not_empty is_not_map is_not_null is_null is_numeric
+ is_present is_string asserting_absent asserting_bool asserting_boolean
+ asserting_empty asserting_empty_map asserting_float asserting_int
+ asserting_map asserting_nonempty_map asserting_not_empty asserting_not_map
  asserting_not_null asserting_null asserting_numeric asserting_present
  asserting_string boolean float fmtnum hexfmt int string typeof depth haskey
  joink joinkv joinv leafcount length mapdiff mapexcept mapselect mapsum splitkv
@@ -1975,6 +1975,16 @@ and string results in string compare.
 .fi
 .if n \{\
 .RE
+.SS "regex_extract"
+.if n \{\
+.RS 0
+.\}
+.nf
+(class=string #args=2): Example: '$name=regex_extract($name, "[A-Z]{3}[0-9]{2}")'
+\&.
+.fi
+.if n \{\
+.RE
 .SS "strlen"
 .if n \{\
 .RS 0