diff --git a/sigstore/sign.py b/sigstore/sign.py
index 856b18116..1257eecac 100644
--- a/sigstore/sign.py
+++ b/sigstore/sign.py
@@ -423,9 +423,7 @@ def to_bundle(self) -> Bundle:
 
         if isinstance(self.content, MessageSignature):
             bundle.message_signature = self.content
-        elif isinstance(self.content, Envelope):
-            bundle.dsse_envelope = self.content
         else:
-            raise ValueError
+            bundle.dsse_envelope = self.content
 
         return bundle