diff --git a/hledger-lib/hledger_csv.m4.md b/hledger-lib/hledger_csv.m4.md
index ad0153c24..f6e060e75 100644
--- a/hledger-lib/hledger_csv.m4.md
+++ b/hledger-lib/hledger_csv.m4.md
@@ -543,8 +543,10 @@ REGEX
 ```
 
 REGEX is a case-insensitive regular expression which tries to match anywhere within the CSV record.
-It is a POSIX extended regular expressions with some additions (see 
-[Regular expressions](https://hledger.org/hledger.html#regular-expressions) in the hledger manual).
+It is a POSIX ERE (extended regular expression) 
+that also supports GNU word boundaries (`\b`, `\B`, `\<`, `\>`),
+and nothing else.
+If you have trouble, be sure to check our https://hledger.org/hledger.html#regular-expressions doc.
 
 Important note: the record that is matched is not the original record, but a synthetic one,
 with any enclosing double quotes (but not enclosing whitespace) removed, and always comma-separated
diff --git a/hledger/hledger.m4.md b/hledger/hledger.m4.md
index c97f0f8b4..fc23483f0 100644
--- a/hledger/hledger.m4.md
+++ b/hledger/hledger.m4.md
@@ -832,18 +832,18 @@ If they're not doing what you expect, it's important to know exactly what they s
 
 #. they are case insensitive
 #. they are infix matching (they do not need to match the entire thing being matched)
-#. they are [POSIX extended regular expressions][]
-#. they also support [word boundaries][] (`\<`, `\>`, `\b`, `\B`)
+#. they are [POSIX ERE][] (extended regular expressions)
+#. they also support [GNU word boundaries][] (`\b`, `\B`, `\<`, `\>`)
 #. they do not support [mode modifiers][] (like `(?s)`)
 #. when searching, they do not support [capturing groups][] and [backreferences][] (`\1`).
    But when used for text replacement (eg in [account aliases](journal.html#regex-aliases)),
    they do support [capturing groups][] in the search string and [backreferences][] in the replacement string.
 
-[POSIX extended regular expressions]: http://www.regular-expressions.info/posix.html#ere
+[POSIX ERE]: http://www.regular-expressions.info/posix.html#ere
 [backreferences]: https://www.regular-expressions.info/backref.html
 [capturing groups]: http://www.regular-expressions.info/refcapture.html
 [mode modifiers]: http://www.regular-expressions.info/modifiers.html
-[word boundaries]: http://www.regular-expressions.info/wordboundaries.html
+[GNU word boundaries]: http://www.regular-expressions.info/wordboundaries.html
 
 Some things to note: