diff --git a/examples/multiprocess_surfs.py b/examples/multiprocess_surfs.py
index a83e25b23..61af05be6 100644
--- a/examples/multiprocess_surfs.py
+++ b/examples/multiprocess_surfs.py
@@ -58,7 +58,7 @@ def _get_regsurff(i):
     sfile = TESTFILE
 
     logger.info("File is %s", sfile)
-    rf = xtgeo.surface_from_file(sfile)
+    rf = xtgeo.surface_from_file(sfile, fformat="irap_binary", engine="python")
     logger.info("End %s", i)
     return rf