diff --git a/pkg/blobserver/diskpacked/diskpacked.go b/pkg/blobserver/diskpacked/diskpacked.go
index 2a9ed50d7..6b2b5d217 100644
--- a/pkg/blobserver/diskpacked/diskpacked.go
+++ b/pkg/blobserver/diskpacked/diskpacked.go
@@ -236,6 +236,7 @@ func (s *storage) StatBlobs(dest chan<- blob.SizedRef, blobs []blob.Ref) (err er
 	var wg syncutil.Group
 
 	for _, br := range blobs {
+		br := br
 		statGate.Start()
 		wg.Go(func() error {
 			defer statGate.Done()
diff --git a/pkg/blobserver/localdisk/stat.go b/pkg/blobserver/localdisk/stat.go
index fa3a93d3c..86dcf05cd 100644
--- a/pkg/blobserver/localdisk/stat.go
+++ b/pkg/blobserver/localdisk/stat.go
@@ -50,6 +50,7 @@ func (ds *DiskStorage) StatBlobs(dest chan<- blob.SizedRef, blobs []blob.Ref) er
 
 	var wg syncutil.Group
 	for _, ref := range blobs {
+		ref := ref
 		statGate.Start()
 		wg.Go(func() error {
 			defer statGate.Done()
diff --git a/pkg/blobserver/s3/remove.go b/pkg/blobserver/s3/remove.go
index 9db1c8755..3fd727bd5 100644
--- a/pkg/blobserver/s3/remove.go
+++ b/pkg/blobserver/s3/remove.go
@@ -27,6 +27,7 @@ func (sto *s3Storage) RemoveBlobs(blobs []blob.Ref) error {
 	var wg syncutil.Group
 
 	for _, blob := range blobs {
+		blob := blob
 		removeGate.Start()
 		wg.Go(func() error {
 			defer removeGate.Done()
diff --git a/pkg/blobserver/s3/stat.go b/pkg/blobserver/s3/stat.go
index 225b1a0af..7a53d15fa 100644
--- a/pkg/blobserver/s3/stat.go
+++ b/pkg/blobserver/s3/stat.go
@@ -30,6 +30,7 @@ func (sto *s3Storage) StatBlobs(dest chan<- blob.SizedRef, blobs []blob.Ref) err
 	var wg syncutil.Group
 
 	for _, br := range blobs {
+		br := br
 		statGate.Start()
 		wg.Go(func() error {
 			defer statGate.Done()