diff --git a/server/src/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java b/server/src/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java
index be077465e12..9edc4dfa7d1 100644
--- a/server/src/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java
+++ b/server/src/com/cloud/network/router/VpcVirtualNetworkApplianceManagerImpl.java
@@ -1120,7 +1120,7 @@ public class VpcVirtualNetworkApplianceManagerImpl extends VirtualNetworkApplian
         String localGuestCidr = vpc.getCidr();
         String localPublicGateway = _vlanDao.findById(ip.getVlanId()).getVlanGateway();
         String peerGatewayIp = gw.getGatewayIp();
-        String peerGuestCidrList = gw.getGuestCidrList();
+        String peerGuestCidrList = gw.getGuestCidrList().replace(";", ",");
         String ipsecPsk = gw.getIpsecPsk();
         String ikePolicy = gw.getIkePolicy();
         String espPolicy = gw.getEspPolicy();