diff --git a/addons/hr_recruitment/models/calendar.py b/addons/hr_recruitment/models/calendar.py
index 5da3ed28f51..976b5019b73 100644
--- a/addons/hr_recruitment/models/calendar.py
+++ b/addons/hr_recruitment/models/calendar.py
@@ -20,7 +20,7 @@ class CalendarEvent(models.Model):
 
         # sync res_model / res_id to opportunity id (aka creating meeting from lead chatter)
         if 'applicant_id' not in defaults and defaults.get('res_id') and (defaults.get('res_model') or defaults.get('res_model_id')):
-            if (defaults.get('res_model') and defaults['res_model'] == 'hr.applicant') or self.env['ir.model'].sudo().browse(defaults['res_model_id']).model == 'hr.applicant':
+            if (defaults.get('res_model') and defaults['res_model'] == 'hr.applicant') or (defaults.get('res_model_id') and self.env['ir.model'].sudo().browse(defaults['res_model_id']).model == 'hr.applicant'):
                 defaults['applicant_id'] = defaults['res_id']
 
         return defaults