diff --git a/parm/use_cases/model_applications/marine_and_cryosphere/ASCII2NC_obsArgo_netCDF_temp_sali.conf b/parm/use_cases/model_applications/marine_and_cryosphere/ASCII2NC_obsArgo_netCDF_temp_sali.conf
index 04d7d5492..73672e88b 100644
--- a/parm/use_cases/model_applications/marine_and_cryosphere/ASCII2NC_obsArgo_netCDF_temp_sali.conf
+++ b/parm/use_cases/model_applications/marine_and_cryosphere/ASCII2NC_obsArgo_netCDF_temp_sali.conf
@@ -91,4 +91,4 @@ ASCII2NC_TIME_SUMMARY_VALID_THRESH = 0.0
 
 [user_env_vars]
 
-PYTHONPATH={MET_INSTALL_DIR}/share/met/python
+PYTHONPATH={MET_INSTALL_DIR}/share/met/python:${PYTHONPATH}