diff --git a/ocrmypdf/exec/ghostscript.py b/ocrmypdf/exec/ghostscript.py
index 0dd8b418..f01707c6 100644
--- a/ocrmypdf/exec/ghostscript.py
+++ b/ocrmypdf/exec/ghostscript.py
@@ -6,6 +6,7 @@ from subprocess import run, PIPE, STDOUT, CalledProcessError
 from shutil import copy
 from functools import lru_cache
 import re
+import sys
 from . import get_program
 from ..exceptions import SubprocessOutputError