diff --git a/scripts/_common.sh b/scripts/_common.sh
index 19c0decc..bce3fa3c 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -25,6 +25,14 @@ wait_nginx_reload() {
     sleep 2
 }
 
+set_datadir() {
+  if [[ -f $install_dir/config/config.php ]]; then
+    data_dir=$(grep datadirectory < $install_dir/config/config.php | sed "s/.*=>.'\([^']*\)'.*/\1/")
+  else
+    data_dir="/home/yunohost.app/$app/data"
+  fi
+}
+
 # Check if an URL is already handled
 # usage: is_url_handled --domain=DOMAIN --path=PATH_URI
 is_url_handled() {
diff --git a/scripts/backup b/scripts/backup
index feb41380..d0f029d0 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -15,6 +15,8 @@ ynh_backup "$install_dir"
 # BACKUP THE DATA DIRECTORY
 #=================================================
 
+set_datadir
+
 ynh_backup "$data_dir"
 
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index cf5ea7e2..cf21fc2b 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -15,6 +15,8 @@ ynh_restore "$install_dir"
 #=================================================
 ynh_script_progression "Restoring data directory..."
 
+set_datadir
+
 ynh_restore "$data_dir"
 
 #=================================================