diff --git a/scripts/brillo_update_payload b/scripts/brillo_update_payload
index 61ecadf..3802e13 100755
--- a/scripts/brillo_update_payload
+++ b/scripts/brillo_update_payload
@@ -628,7 +628,7 @@
   GENERATOR_ARGS=(
     -in_file="${FLAGS_unsigned_payload}"
     -signature_size="${FLAGS_signature_size}"
-    -signature_file="${FLAGS_payload_signature_file}"
+    -payload_signature_file="${FLAGS_payload_signature_file}"
     -metadata_signature_file="${FLAGS_metadata_signature_file}"
     -out_file="${FLAGS_payload}"
   )