diff --git a/README b/README
index 4d8faf9..2707e9e 100644
--- a/README
+++ b/README
@@ -112,10 +112,9 @@ Test your configuration thoroughly before closing the root shell.
 === Module Arguments
 
 The following table documents the set of arguments recognized by the module.
-Defaults values are hard-wired, but they can be overridden by a
-<<confFile,configuration file>>, if any is found.
-The definitions from the configuration file can be in turn overridden by
-individual files under `/etc/pam.d/`.
+Hard-wired defaults can be overridden by a <<confFile,configuration file>>,
+if any is found. The definitions from the configuration file can be in turn
+overridden by individual files under `/etc/pam.d/`.
 
 [horizontal]
 debug::
@@ -419,25 +418,29 @@ restarts from the top of the list.
 [[confFile]]
 == Configuration file
 
-A global configuration file can be supplied in order to override
-the hard-wired defaults for the `pam_u2f.so` module arguments.
+A configuration file can be supplied to provide system-level default values for
+the `pam_u2f.so` module arguments.
 
-The file can contain the same arguments as
-<<moduleArguments,defined above>> with a few caveats:
-- The `conf_file=` argument is special, in that it can only appear in a file
-  under `/etc/pam.d/`, and not in the `pam_u2f.so` configuration file itself.
-- Brackets around arguments are *not* needed in order to get spaces correctly
-  recognized.
+The file can contain, one per line, the same arguments as
+<<moduleArguments,defined above>>, with the following caveats:
 
-Arguments appear one per line.
-Heading whitespaces are ignored.
-Lines starting with `#` and empty lines are interpreted as comments.
+- The `conf_file=` argument can only appear in a file under `/etc/pam.d/`, and
+  not in the `pam_u2f.so` configuration file itself.
 
-The default position of the configuration file is
+- Square brackets around arguments, needed under `/etc/pam.d` to get spaces
+  correctly recognized, must not be supplied.
+
+Lines starting with `#` are interpreted as comments and skipped together with
+empty lines.
+Heading white-spaces (intended as in `isspace(3)`) are ignored. Everything
+from the first non-white-space character till the end of line is interpreted
+verbatim.
+
+The default file-system location of the configuration file is
 `/etc/security/pam_u2f.conf`.
 Individual files under `/etc/pam.d/` can override such path
-file by means of the `conf_file=` argument.
-The override will not affect other `/etc/pam.d/` files.
+by means of the `conf_file=` argument, with no side effect on
+other `/etc/pam.d/` files.
 
 == SELinux Note
 
diff --git a/man/pam_u2f.8.txt b/man/pam_u2f.8.txt
index 88eb2e0..b22abab 100644
--- a/man/pam_u2f.8.txt
+++ b/man/pam_u2f.8.txt
@@ -169,24 +169,29 @@ impossibility of logging into the system. The partition is decrypted
 after login and the mapping file can not be accessed.
 
 == CONFIGURATION FILE
-A global configuration file can be supplied in order to override
-the hard-wired defaults for the `pam_u2f.so` module arguments.
+A configuration file can be supplied to provide system-level default
+values for the `pam_u2f.so` module arguments.
 
-The file can contain the same arguments as defined above, with a few caveats:
-- The `conf_file=` argument is special, in that it can only appear in a file
-  under `/etc/pam.d/`, and not in the `pam_u2f.so` configuration file itself.
-- Brackets around arguments are *not* needed in order to get spaces correctly
-  recognized.
+The file can contain, one per line, the same arguments as defined in the *OPTIONS*
+section above, with the following caveats:
 
-Arguments appear one per line.
-Heading whitespaces are ignored.
-Lines starting with `#` and empty lines are interpreted as comments.
+- The `conf_file=` argument can only appear in a file under `/etc/pam.d/`, and
+  not in the `pam_u2f.so` configuration file itself.
 
-The default position of the configuration file is
+- Square brackets around arguments, needed under `/etc/pam.d` to get spaces
+  correctly recognized, must not be supplied.
+
+Lines starting with `#` are interpreted as comments and skipped together with
+empty lines.
+Heading white-spaces (intended as in `isspace(3)`) are ignored. Everything
+from the first non-white-space character till the end of line is interpreted
+verbatim.
+
+The default file-system location of the configuration file is
 `/etc/security/pam_u2f.conf`.
 Individual files under `/etc/pam.d/` can override such path
-file by means of the `conf_file=` argument.
-The override will not affect other `/etc/pam.d/` files.
+by means of the `conf_file=` argument, with no side effect on
+other `/etc/pam.d/` files.
 
 == NOTES