diff --git a/core/src/main/java/org/bitcoinj/wallet/Wallet.java b/core/src/main/java/org/bitcoinj/wallet/Wallet.java
index e08125e4..9f75fa3b 100644
--- a/core/src/main/java/org/bitcoinj/wallet/Wallet.java
+++ b/core/src/main/java/org/bitcoinj/wallet/Wallet.java
@@ -4807,9 +4807,10 @@ public class Wallet extends BaseTaggableObject
         try {
             if (!watchedScripts.isEmpty())
                 return true;
-            for (DeterministicKeyChain chain : keyChainGroup.chains)
-                if (chain.getOutputScriptType() == Script.ScriptType.P2WPKH)
-                    return true;
+            if (keyChainGroup.chains != null)
+                for (DeterministicKeyChain chain : keyChainGroup.chains)
+                    if (chain.getOutputScriptType() == Script.ScriptType.P2WPKH)
+                        return true;
             return false;
         } finally {
             keyChainGroupLock.unlock();