diff --git a/collector/btrfs_linux.go b/collector/btrfs_linux.go
index b5642b331a..f1490541a9 100644
--- a/collector/btrfs_linux.go
+++ b/collector/btrfs_linux.go
@@ -135,6 +135,7 @@ func (c *btrfsCollector) getIoctlStats() (map[string]*btrfsIoctlFsStats, error)
 				"err", err)
 			continue
 		}
+		defer fs.Close()
 
 		fsInfo, err := fs.Info()
 		if err != nil {