diff --git a/django/forms/formsets.py b/django/forms/formsets.py
index 10306c7e6d..7a5cb8a439 100644
--- a/django/forms/formsets.py
+++ b/django/forms/formsets.py
@@ -258,7 +258,7 @@ class BaseFormSet(StrAndUnicode):
         Returns True if the formset needs to be multipart-encrypted, i.e. it
         has FileInput. Otherwise, False.
         """
-        return self.forms[0].is_multipart()
+        return self.forms and self.forms[0].is_multipart()
 
     def _get_media(self):
         # All the forms on a FormSet are the same, so you only need to