diff --git a/swash/processing/swash.py b/swash/processing/swash.py
index 8d7bb93..bcf9244 100644
--- a/swash/processing/swash.py
+++ b/swash/processing/swash.py
@@ -28,7 +28,7 @@ if out.exists():
 with tempfile.TemporaryDirectory(prefix="swash_", dir=".") as tmp_raw:
     tmpdir = pathlib.Path(tmp_raw)
 
-    if config.hasoption("swash", "mpi"):
+    if config.has_option("swash", "mpi"):
         mpi = ("-mpi", config.getint("swash", "mpi"))
     else:
         mpi = ()