diff --git a/internal/dump/tar.go b/internal/dump/tar.go
index 5d3a10f53..86786654a 100644
--- a/internal/dump/tar.go
+++ b/internal/dump/tar.go
@@ -72,7 +72,7 @@ func tarNode(ctx context.Context, tw *tar.Writer, node *restic.Node, repo restic
 	}
 
 	header := &tar.Header{
-		Name:       relPath,
+		Name:       filepath.ToSlash(relPath),
 		Size:       int64(node.Size),
 		Mode:       int64(node.Mode),
 		Uid:        int(node.UID),
diff --git a/internal/dump/tar_test.go b/internal/dump/tar_test.go
index 3c5ae7b43..fddbef7f0 100644
--- a/internal/dump/tar_test.go
+++ b/internal/dump/tar_test.go
@@ -147,8 +147,9 @@ func checkTar(t *testing.T, testDir string, srcTar *bytes.Buffer) error {
 				continue
 			}
 
-			if filepath.Base(hdr.Name) != match.Name() {
-				return fmt.Errorf("foldernames don't match got %v want %v", filepath.Base(hdr.Name), match.Name())
+			filebase := filepath.ToSlash(match.Name())
+			if filepath.Base(hdr.Name) != filebase {
+				return fmt.Errorf("foldernames don't match got %v want %v", filepath.Base(hdr.Name), filebase)
 			}
 
 		} else {