diff --git a/p2pool/sidechain/poolblock.go b/p2pool/sidechain/poolblock.go
index e46e156..ccd791b 100644
--- a/p2pool/sidechain/poolblock.go
+++ b/p2pool/sidechain/poolblock.go
@@ -83,7 +83,7 @@ type PoolBlock struct {
 	WantBroadcast atomic.Bool `json:"-"`
 	Broadcasted   atomic.Bool `json:"-"`
 
-	Metadata PoolBlockReceptionMetadata `json:"-"`
+	Metadata PoolBlockReceptionMetadata `json:"metadata"`
 
 	CachedShareVersion ShareVersion `json:"share_version"`