diff --git a/src/rda_python_common/PgDBI.py b/src/rda_python_common/PgDBI.py
index 71e7916..a0be149 100644
--- a/src/rda_python_common/PgDBI.py
+++ b/src/rda_python_common/PgDBI.py
@@ -2222,7 +2222,7 @@ def get_pgpass_password():
 
    if PGDBI['PWNAME']: return PGDBI['PWNAME']
    if not DBPASS: read_pgpass()  
-   return DBPASS.get((PGDBI['DBSHOST'], PGDBI['DBPORT'], PGDBI['DBNAME'], PGDBI['USNAME']))
+   return DBPASS.get((PGDBI['DBSHOST'], PGDBI['DBPORT'], PGDBI['DBNAME'], PGDBI['LNNAME']))
 
 #
 # Reads the .pgpass file and returns a dictionary of credentials.