diff --git a/check_pg_streaming_replication b/check_pg_streaming_replication
index fcd2745..c8a222d 100755
--- a/check_pg_streaming_replication
+++ b/check_pg_streaming_replication
@@ -34,7 +34,6 @@ PG_MAIN=""
 PG_MASTER_USER=""
 PSQL_BIN=/usr/bin/psql
 PG_LSCLUSTER_BIN=/usr/bin/pg_lsclusters
-RECOVERY_CONF_FILENAME=recovery.conf
 RECOVERY_CONF=""
 PG_DEFAULT_PORT=""
 PG_DEFAULT_APP_NAME=$( hostname )
@@ -55,7 +54,7 @@ Usage: $0 [-d] [-h] [options]
 	-m pg_main		Specify Postgres main directory path (Default: try to auto-detect or use
                                 $DEFAULT_PG_MAIN)
 	-r recovery_conf	Specify Postgres recovery configuration file path
-				(Default: [PG_MAIN]/$RECOVERY_CONF_FILENAME)
+				(Default: [PG_MAIN]/recovery.conf on PG <= 11, [PG_MAIN]/postgresql.auto.conf on PG >= 12)
 	-U pg_master_user	Specify Postgres user to use on master (Default: user from recovery.conf file)
 	-p pg_port		Specify default Postgres master TCP port (Default: same as local PostgreSQL
 	                        port if detected or use $DEFAULT_PG_PORT)
@@ -180,7 +179,10 @@ id "$PG_USER" > /dev/null 2>&1
 [ ! -d "$PG_MAIN/" ] && echo "UNKNOWN: Invalid Postgres main directory path ($PG_MAIN)" && exit 3
 
 # Check RECOVERY_CONF
-[ -z "$RECOVERY_CONF" ] && RECOVERY_CONF="$PG_MAIN/$RECOVERY_CONF_FILENAME"
+if [ -z "$RECOVERY_CONF" ]; then
+	[ $PG_VERSION -le 11 ] && RECOVERY_CONF_FILENAME="recovery.conf" || RECOVERY_CONF_FILENAME="postgresql.auto.conf"
+	RECOVERY_CONF="$PG_MAIN/$RECOVERY_CONF_FILENAME"
+fi
 
 # Check PG_DEFAULT_PORT
 [ $( echo "$PG_DEFAULT_PORT"|grep -c -E '^[0-9]*$' ) -ne 1 ] && "UNKNOWN: Postgres default master TCP port must be an integer." && exit 3