diff --git a/app/models.py b/app/models.py
index 4468742..bc09532 100644
--- a/app/models.py
+++ b/app/models.py
@@ -485,7 +485,7 @@ class Keyword(models.Model):
     keyword = models.TextField(blank=True, null=True)
     
     def __str__(self):
-        return '%s > %s' % (self.mother, self.keyword)
+        return '%s > %s' % (self.mother, self.keyword) if self.mother else self.keyword
     
 
 class ResourceKeyword(models.Model):