diff --git a/zds/utils/models.py b/zds/utils/models.py
index f10b301e9e..3d89d46cf8 100644
--- a/zds/utils/models.py
+++ b/zds/utils/models.py
@@ -289,7 +289,7 @@ class Meta:
 
 class TagManager(models.Manager):
     def get_from_title(self, title):
-        if len(slugify(title.strip())) < 1:
+        if not title.strip() or not slugify(title.strip().replace("-", "")):
             raise ValueError('tag "{}" is not correct'.format(title))
         current_tag = self.filter(title=title).first()
         if current_tag is None: