diff --git a/scripts/upgrade b/scripts/upgrade
index db37df7..4ed1b97 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -34,6 +34,15 @@ ynh_script_progression --message="Checking version..."
 
 upgrade_type=$(ynh_check_app_version_changed)
 
+#=================================================
+# FIX MISSING APP SETTING THAT BREAKS BACKUP
+#=================================================
+# If datapath doesn't exist, create it
+if [ -z "$datapath" ]; then
+	datapath=/home/yunohost.app/$app
+	ynh_app_setting_set --app=$app --key=datapath --value=$datapath
+fi
+
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================