diff --git a/pysurfex/forcing.py b/pysurfex/forcing.py
index 84b90ad..b9d48ba 100644
--- a/pysurfex/forcing.py
+++ b/pysurfex/forcing.py
@@ -1,4 +1,5 @@
 """Forcing."""
+
 import abc
 import copy
 import json
@@ -764,6 +765,7 @@ def set_forcing_config(**kwargs):
     co2 = "default"
     co2_converter = "none"
 
+    diskless_write = False
     analysis = False
     interpolation = None
     try:
@@ -772,7 +774,6 @@ def set_forcing_config(**kwargs):
         input_format = kwargs["input_format"]
         output_format = kwargs["output_format"]
         outfile = kwargs["of"]
-        diskless_write = kwargs["diskless_write"]
         zref = kwargs["zref"]
         uref = kwargs["uref"]
         config = kwargs["config"]
@@ -848,6 +849,8 @@ def set_forcing_config(**kwargs):
             co2 = kwargs["co2"]
         if "co2_converter" in kwargs:
             co2_converter = kwargs["co2_converter"]
+        if "diskless_write" in kwargs:
+            diskless_write = kwargs["diskless_write"]
 
     except ValueError:
         raise Exception("Needed input is missing") from ValueError