diff --git a/esmvalcore/_recipe.py b/esmvalcore/_recipe.py
index 02c3781279..9857b33a0d 100644
--- a/esmvalcore/_recipe.py
+++ b/esmvalcore/_recipe.py
@@ -401,11 +401,23 @@ def _get_correct_fx_file(variable, fx_varname, config_user):
         elif fx_varname == 'sftgif':
             fx_var = _add_fxvar_keys({'short_name': fx_varname, 'mip': 'fx'},
                                      var)
+        elif fx_varname == 'volcello':
+            fx_var = _add_fxvar_keys({'short_name': fx_varname, 'mip': 'Ofx'},
+                                     var)
     else:
         raise RecipeError(
             f"Project {var['project']} not supported with fx variables")
 
     fx_files = _get_input_files(fx_var, config_user)
+
+    # If can't find Ofx files, then try with original variable mip
+    if not fx_files and fx_var['mip'] == 'Ofx':
+        fx_var['mip'] = var['mip']
+        fx_files = _get_input_files(fx_var, config_user)
+
+    if not fx_files:
+        logger.warning("Unable to locate Fx files in Ofx or %s", var['mip'])
+
     # allow for empty lists corrected for by NE masks
     if fx_files:
         fx_files = fx_files[0]