diff --git a/data/helpers.d/mysql b/data/helpers.d/mysql
index 56741ec0e..8aa81a1fe 100644
--- a/data/helpers.d/mysql
+++ b/data/helpers.d/mysql
@@ -8,7 +8,7 @@ MYSQL_ROOT_PWD_FILE=/etc/yunohost/mysql
 # usage: ynh_mysql_connect_as user pwd [db]
 # | arg: user - the user name to connect as
 # | arg: pwd - the user password
-# | arg: db - the database to connect to
+# | arg: db - the database to connect to
 ynh_mysql_connect_as() {
     mysql -u "$1" --password="$2" -B "${3:-}"
 }
@@ -17,7 +17,7 @@ ynh_mysql_connect_as() {
 #
 # usage: ynh_mysql_execute_as_root sql [db]
 # | arg: sql - the SQL command to execute
-# | arg: db - the database to connect to
+# | arg: db - the database to connect to
 ynh_mysql_execute_as_root() {
     ynh_mysql_connect_as "root" "$(sudo cat $MYSQL_ROOT_PWD_FILE)" \
         "${2:-}" <<< "$1"
@@ -27,7 +27,7 @@ ynh_mysql_execute_as_root() {
 #
 # usage: ynh_mysql_execute_file_as_root file [db]
 # | arg: file - the file containing SQL commands
-# | arg: db - the database to connect to
+# | arg: db - the database to connect to
 ynh_mysql_execute_file_as_root() {
     ynh_mysql_connect_as "root" "$(sudo cat $MYSQL_ROOT_PWD_FILE)" \
         "${2:-}" < "$1"