diff --git a/sponsor-patch b/sponsor-patch
index 6d3b9c6..9c264c8 100755
--- a/sponsor-patch
+++ b/sponsor-patch
@@ -530,7 +530,10 @@ def main(script_name, bug_number, build, edit, keyid, upload, verbose=False):
 			Print.info("Failed to update timetamp in debian/changelog.")
 
 		# Build source package
-		cmd = ["debuild", "--no-lintian", "-S"]
+		if patch:
+			cmd = ['debuild', '--no-lintian', '-S']
+		elif branch:
+			cmd = ['bzr', 'bd', '-S', '--', '--no-lintian']
 		previous_version = task.get_previous_version()
 		cmd.append("-v" + previous_version.full_version)
 		if previous_version.upstream_version == changelog.upstream_version \