diff --git a/board/forms.py b/board/forms.py
index cbac793..36ce1dc 100644
--- a/board/forms.py
+++ b/board/forms.py
@@ -46,7 +46,7 @@ class PostForm(ModelForm):
 
     def clean_name(self):
         name = self.cleaned_data["name"]
-        if "##" in name:
+        if name and "##" in name:
             name, password = [v.strip() for v in name.split("##", 1)]
             self.instance.tripcode = generate_tripcode(password)
         return name