diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h
index 90e3a7f0e..c587f30cb 100644
--- a/src/wallet/wallet.h
+++ b/src/wallet/wallet.h
@@ -58,6 +58,7 @@ static const unsigned int MAX_FREE_TRANSACTION_CREATE_SIZE = 1000;
 //! Size of witness cache
 //  Should be large enough that we can expect not to reorg beyond our cache
 //  unless there is some exceptional network disruption.
+#define _COINBASE_MATURITY 64
 static const unsigned int WITNESS_CACHE_SIZE = _COINBASE_MATURITY+1;
 
 class CAccountingEntry;