diff --git a/data/helpers.d/filesystem b/data/helpers.d/filesystem
index 6361d278e..6836aeebe 100644
--- a/data/helpers.d/filesystem
+++ b/data/helpers.d/filesystem
@@ -136,6 +136,8 @@ ynh_restore () {
 
 # Return the path in the archive where has been stocked the origin path
 #
+# [internal]
+#
 # usage: _get_archive_path ORIGIN_PATH
 _get_archive_path () {
     # For security reasons we use csv python library to read the CSV
@@ -203,6 +205,9 @@ ynh_restore_file () {
 }
 
 # Deprecated helper since it's a dangerous one!
+#
+# [internal]
+#
 ynh_bind_or_cp() {
     local AS_ROOT=${3:-0}
     local NO_ROOT=0
@@ -213,6 +218,8 @@ ynh_bind_or_cp() {
 
 # Create a directory under /tmp
 #
+# [internal]
+#
 # Deprecated helper
 #
 # usage: ynh_mkdir_tmp
diff --git a/data/helpers.d/mysql b/data/helpers.d/mysql
index 452a95eec..7bc93fad5 100644
--- a/data/helpers.d/mysql
+++ b/data/helpers.d/mysql
@@ -35,6 +35,8 @@ ynh_mysql_execute_file_as_root() {
 
 # Create a database and grant optionnaly privilegies to a user
 #
+# [internal]
+#
 # usage: ynh_mysql_create_db db [user [pwd]]
 # | arg: db - the database name to create
 # | arg: user - the user to grant privilegies
@@ -56,6 +58,8 @@ ynh_mysql_create_db() {
 
 # Drop a database
 #
+# [internal]
+#
 # If you intend to drop the database *and* the associated user,
 # consider using ynh_mysql_remove_db instead.
 #
@@ -78,6 +82,8 @@ ynh_mysql_dump_db() {
 
 # Create a user
 #
+# [internal]
+#
 # usage: ynh_mysql_create_user user pwd [host]
 # | arg: user - the user name to create
 # | arg: pwd - the password to identify user by
@@ -103,6 +109,8 @@ ynh_mysql_user_exists()
 
 # Drop a user
 #
+# [internal]
+#
 # usage: ynh_mysql_drop_user user
 # | arg: user - the user name to drop
 ynh_mysql_drop_user() {
diff --git a/data/helpers.d/package b/data/helpers.d/package
index c616105d1..4d147488c 100644
--- a/data/helpers.d/package
+++ b/data/helpers.d/package
@@ -26,6 +26,8 @@ ynh_package_version() {
 
 # APT wrapper for non-interactive operation
 #
+# [internal]
+#
 # usage: ynh_apt update
 ynh_apt() {
     DEBIAN_FRONTEND=noninteractive sudo apt-get -y -qq $@
@@ -73,6 +75,8 @@ ynh_package_autopurge() {
 
 # Build and install a package from an equivs control file
 #
+# [internal]
+#
 # example: generate an empty control file with `equivs-control`, adjust its
 #          content and use helper to build and install the package:
 #              ynh_package_install_from_equivs /path/to/controlfile
diff --git a/data/helpers.d/print b/data/helpers.d/print
index d9c8f1ec4..b13186d62 100644
--- a/data/helpers.d/print
+++ b/data/helpers.d/print
@@ -6,7 +6,11 @@ ynh_die() {
 }
 
 # Ignore the yunohost-cli log to prevent errors with conditionals commands
+#
+# [internal]
+#
 # usage: ynh_no_log COMMAND
+#
 # Simply duplicate the log, execute the yunohost command and replace the log without the result of this command
 # It's a very badly hack...
 ynh_no_log() {
diff --git a/data/helpers.d/system b/data/helpers.d/system
index dbd21a4ec..70cc57493 100644
--- a/data/helpers.d/system
+++ b/data/helpers.d/system
@@ -1,5 +1,7 @@
 # Manage a fail of the script
 #
+# [internal]
+#
 # usage: 
 # ynh_exit_properly is used only by the helper ynh_abort_if_errors.
 # You should not use it directly.
@@ -36,7 +38,8 @@ ynh_exit_properly () {
 #
 # This configure the rest of the script execution such that, if an error occurs
 # or if an empty variable is used, the execution of the script stops
-# immediately and a call to `ynh_exit_properly` is triggered.
+# immediately and a call to `ynh_clean_setup` is triggered if it has been
+# defined by your script.
 #
 ynh_abort_if_errors () {
 	set -eu	# Exit if a command fail, and if a variable is used unset.