diff --git a/pretalx_broadcast_tools/exporter.py b/pretalx_broadcast_tools/exporter.py
index 0289413..a6b8bb1 100644
--- a/pretalx_broadcast_tools/exporter.py
+++ b/pretalx_broadcast_tools/exporter.py
@@ -39,7 +39,7 @@ class PDFInfoPage(Flowable):
     def _questions(self):
         return {
             int(i.strip())
-            for i in self.event.settings.broadcast_tools_pdf_questions_to_include.split(
+            for i in (self.event.settings.broadcast_tools_pdf_questions_to_include or "").split(
                 ","
             )
             if i
diff --git a/pretalx_broadcast_tools/signals.py b/pretalx_broadcast_tools/signals.py
index 8706744..a3eb526 100644
--- a/pretalx_broadcast_tools/signals.py
+++ b/pretalx_broadcast_tools/signals.py
@@ -37,7 +37,7 @@ def navbar_info(sender, request, **kwargs):
     ]
 
 
-@receiver(register_data_exporters, dispatch_uid="exporter_broadcast_pdfexporter")
+@receiver(register_data_exporters, dispatch_uid="exporter_broadcast_pdf")
 def register_data_exporter(sender, **kwargs):
     from .exporter import PDFExporter