diff --git a/spa/api/v1/UserResource.py b/spa/api/v1/UserResource.py
index 250dfec..a47c20d 100644
--- a/spa/api/v1/UserResource.py
+++ b/spa/api/v1/UserResource.py
@@ -41,4 +41,10 @@ class UserResource(BackboneCompatibleResource):
 
     def apply_authorization_limits(self, request, object_list):
         if request.user is not None:
-            return object_list.filter(user=request.user)
\ No newline at end of file
+            return object_list.filter(user=request.user)
+
+    def hydrate_profile_slug(self, bundle):
+        if bundle.data['profile_slug'] == '':
+            bundle.data['profile_slug'] = None
+        return bundle
+
diff --git a/spa/models/UserProfile.py b/spa/models/UserProfile.py
index fa3702d..dc80f22 100644
--- a/spa/models/UserProfile.py
+++ b/spa/models/UserProfile.py
@@ -28,7 +28,7 @@ class UserProfile(_BaseModel):
     avatar_type = models.CharField(max_length=15, default='social')
     avatar_image = models.ImageField(blank=True, upload_to=avatar_name)
     display_name = models.CharField(blank=True, max_length=35)
-    profile_slug = models.CharField(blank=True, max_length=35)
+    profile_slug = models.CharField(max_length=35, blank=True, null=True, default=None)
     activity_sharing = models.IntegerField(default=0)
     activity_sharing_networks = models.IntegerField(default=0)
     def save(self, size=(260, 180)):
@@ -39,6 +39,9 @@ class UserProfile(_BaseModel):
         if not self.id and not self.source:
             return
 
+        if self.profile_slug == '':
+            self.profile_slug = None
+
         super(UserProfile, self).save()
 
         filename = self.get_source_filename()