diff --git a/superset/views/core.py b/superset/views/core.py
index 08d52f8919c..197dbe75b00 100755
--- a/superset/views/core.py
+++ b/superset/views/core.py
@@ -633,8 +633,9 @@ class DashboardModelView(SupersetModelView, DeleteMixin):  # noqa
     }
 
     def pre_add(self, obj):
-        obj.slug = obj.slug.strip() or None
+        obj.slug = obj.slug or None
         if obj.slug:
+            obj.slug = obj.slug.strip()
             obj.slug = obj.slug.replace(' ', '-')
             obj.slug = re.sub(r'[^\w\-]+', '', obj.slug)
         if g.user not in obj.owners: