diff --git a/core/src/main/java/com/google/bitcoin/store/WalletProtobufSerializer.java b/core/src/main/java/com/google/bitcoin/store/WalletProtobufSerializer.java
index 714532d7..461c4554 100644
--- a/core/src/main/java/com/google/bitcoin/store/WalletProtobufSerializer.java
+++ b/core/src/main/java/com/google/bitcoin/store/WalletProtobufSerializer.java
@@ -457,7 +457,7 @@ public class WalletProtobufSerializer {
         }
 
         if (txProto.hasLockTime()) {
-            tx.setLockTime(txProto.getLockTime());
+            tx.setLockTime(0xffffffffL & txProto.getLockTime());
         }
 
         // Transaction should now be complete.