diff --git a/app/models.py b/app/models.py
index 4b96d2e..3321d16 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) if self.mother.keyword != '->' and self.mother != '->' else self.keyword
+        return '%s > %s' % (self.mother, self.keyword) if self.mother.keyword != '->' and str(self.mother) == '0' else self.keyword
     
 
 class ResourceKeyword(models.Model):