diff --git a/src/ripple/app/ledger/impl/LedgerMaster.cpp b/src/ripple/app/ledger/impl/LedgerMaster.cpp
index 88adbc63c..68733671e 100644
--- a/src/ripple/app/ledger/impl/LedgerMaster.cpp
+++ b/src/ripple/app/ledger/impl/LedgerMaster.cpp
@@ -211,6 +211,7 @@ LedgerMaster::setValidLedger(
             !app_.getMaxDisallowedLedger() ||
             l->info().seq + max_ledger_difference_ >
                     app_.getMaxDisallowedLedger());
+    (void) max_ledger_difference_;
     mValidLedgerSeq = l->info().seq;
 
     app_.getOPs().updateLocalTx (*l);