diff --git a/src/groundlight/internalapi.py b/src/groundlight/internalapi.py
index 48e87cf6..40a7dffe 100644
--- a/src/groundlight/internalapi.py
+++ b/src/groundlight/internalapi.py
@@ -176,7 +176,7 @@ def call_api(self, *args, **kwargs):
         # Note we don't look for header_param in kwargs here, because this method is only called in one place
         # in the generated code, so we can afford to make this brittle.
         header_param = args[4]  # that's the number in the list
-        if not header_param:
+        if header_param is None:
             # This will never happen in normal usage.
             logger.warning("Can't set request-id because headers not set")
         elif not header_param.get(self.REQUEST_ID_HEADER, None):