diff --git a/core/src/main/java/com/google/bitcoin/protocols/channels/PaymentChannelServerState.java b/core/src/main/java/com/google/bitcoin/protocols/channels/PaymentChannelServerState.java
index 5e30e0b2..024660d5 100644
--- a/core/src/main/java/com/google/bitcoin/protocols/channels/PaymentChannelServerState.java
+++ b/core/src/main/java/com/google/bitcoin/protocols/channels/PaymentChannelServerState.java
@@ -303,7 +303,7 @@ public class PaymentChannelServerState {
         // was not connected to the peergroup when the contract was broadcast (which may cause issues down the road, and
         // disables our double-spend check next)
         Transaction walletContract = wallet.getTransaction(multisigContract.getHash());
-        checkState(walletContract != null, "Wallet did not contain multisig contract after state was marked READY");
+        checkState(walletContract != null, "Wallet did not contain multisig contract {} after state was marked READY", multisigContract.getHash());
 
         // Note that we check for DEAD state here, but this test is essentially useless in production because we will
         // miss most double-spends due to bloom filtering right now anyway. This will eventually fixed by network-wide