diff --git a/chain/interface.go b/chain/interface.go
index 1f201d3..885f632 100644
--- a/chain/interface.go
+++ b/chain/interface.go
@@ -70,7 +70,7 @@ type (
 		Blocks           []wtxmgr.BlockMeta
 		ExternalAddrs    map[waddrmgr.ScopedIndex]btcutil.Address
 		InternalAddrs    map[waddrmgr.ScopedIndex]btcutil.Address
-		WatchedOutPoints map[wire.OutPoint]struct{}
+		WatchedOutPoints map[wire.OutPoint]btcutil.Address
 	}
 
 	// FilterBlocksResponse reports the set of all internal and external
@@ -85,7 +85,7 @@ type (
 		BlockMeta          wtxmgr.BlockMeta
 		FoundExternalAddrs map[waddrmgr.KeyScope]map[uint32]struct{}
 		FoundInternalAddrs map[waddrmgr.KeyScope]map[uint32]struct{}
-		FoundOutPoints     map[wire.OutPoint]struct{}
+		FoundOutPoints     map[wire.OutPoint]btcutil.Address
 		RelevantTxns       []*wire.MsgTx
 	}