diff --git a/dev/n_osync.sh b/dev/n_osync.sh
index 5340999..14d001e 100644
--- a/dev/n_osync.sh
+++ b/dev/n_osync.sh
@@ -7,7 +7,7 @@ PROGRAM="osync" # Rsync based two way sync engine with fault tolerance
 AUTHOR="(C) 2013-2019 by Orsiris de Jong"
 CONTACT="http://www.netpower.fr/osync - ozy@netpower.fr"
 PROGRAM_VERSION=1.3.0-pre-rc1
-PROGRAM_BUILD=2019052001
+PROGRAM_BUILD=2019052002
 IS_STABLE=false
 
 CONFIG_FILE_REVISION_REQUIRED=1.3.0
@@ -243,6 +243,13 @@ function CheckCurrentConfigAll {
 			exit 1
 		fi
 	fi
+
+	if [ "$SYNC_TYPE" != "" ]; then
+		if [ "$SYNC_TYPE" != "initiator2target" ] && [ "$SYNC_TYPE" != "target2initiator" ]; then
+			Logger "Bogus sync type parameter [$SYNC_TYPE]." "CRITICAL"
+			exit 1
+		fi
+	fi
 }
 
 ###### Osync specific functions (non shared)
@@ -2771,6 +2778,7 @@ function Usage {
 	echo "--remote-token=\"\"       When using ssh filter protection, you must specify the remote token set in ssh_filter.sh"
 	echo "--instance-id=\"\"	Optional sync task name to identify this synchronization task when using multiple targets"
 	echo "--skip-deletion=\"\"      You may skip deletion propagation on initiator or target. Valid values: initiator target initiator,target"
+	echo "--sync-type=\"\"          Allows osync to run in unidirectional sync mode. Valid values: initiator2target, target2initiator"
 	echo "--destination-mails=\"\"  Double quoted list of space separated email addresses to send alerts to"
 	echo ""
 	echo "Additionaly, you may set most osync options at runtime. eg:"
@@ -2990,6 +2998,10 @@ function GetCommandlineArguments {
 			opts=$opts" --skip-deletion=\"${i##*=}\""
 			SKIP_DELETION=${i##*=}
 			;;
+			--sync-type=*)
+			opts=$opts" --sync-type=\"${i##*=}\""
+			SYNC_TYPE=${i##*=}
+			;;
 			--on-changes)
 			_SYNC_ON_CHANGES="initiator"
 			_NOLOCKS=true
diff --git a/sync.conf.example b/sync.conf.example
index 24e672e..0f3384c 100644
--- a/sync.conf.example
+++ b/sync.conf.example
@@ -147,6 +147,9 @@ SOFT_DELETE_DAYS=30
 ## Optional deletion skip on replicas. Valid values are "initiator", "target", or "initiator,target"
 SKIP_DELETION=
 
+## Optional sync type. By default, osync is bidirectional. You may want to use osync as unidirectional sync in some circumstances. Valid values are "initiator2target" or "target2initiator"
+SYNC_TYPE=
+
 [RESUME_OPTIONS]
 
 ## Try to resume an aborted sync task