diff --git a/tsdb/agent/db.go b/tsdb/agent/db.go
index 7d42d14feb..b0fe1f9627 100644
--- a/tsdb/agent/db.go
+++ b/tsdb/agent/db.go
@@ -410,6 +410,7 @@ func (db *DB) loadWAL(r *wal.Reader, multiRef map[chunks.HeadSeriesRef]chunks.He
 
 	go func() {
 		defer close(decoded)
+		var err error
 		for r.Next() {
 			rec := r.Record()
 			switch dec.Type(rec) {
diff --git a/tsdb/head_wal.go b/tsdb/head_wal.go
index d0fe685ffb..02f4aeadb0 100644
--- a/tsdb/head_wal.go
+++ b/tsdb/head_wal.go
@@ -133,6 +133,7 @@ func (h *Head) loadWAL(r *wal.Reader, multiRef map[chunks.HeadSeriesRef]chunks.H
 
 	go func() {
 		defer close(decoded)
+		var err error
 		for r.Next() {
 			rec := r.Record()
 			switch dec.Type(rec) {