diff --git a/src/main/java/org/qortal/controller/OnlineAccountsManager.java b/src/main/java/org/qortal/controller/OnlineAccountsManager.java
index a5f86b48..092cae05 100644
--- a/src/main/java/org/qortal/controller/OnlineAccountsManager.java
+++ b/src/main/java/org/qortal/controller/OnlineAccountsManager.java
@@ -117,7 +117,8 @@ public class OnlineAccountsManager extends Thread {
     }
 
     public static long getOnlineTimestampModulus() {
-        if (NTP.getTime() >= BlockChain.getInstance().getOnlineAccountsModulusV2Timestamp()) {
+        Long now = NTP.getTime();
+        if (now != null && now >= BlockChain.getInstance().getOnlineAccountsModulusV2Timestamp()) {
             return ONLINE_TIMESTAMP_MODULUS_V2;
         }
         return ONLINE_TIMESTAMP_MODULUS_V1;