diff --git a/backend/posix/with_otmpfile.go b/backend/posix/with_otmpfile.go
index d5532d20..17abd9bd 100644
--- a/backend/posix/with_otmpfile.go
+++ b/backend/posix/with_otmpfile.go
@@ -101,6 +101,7 @@ func (p *Posix) openTmpFile(dir, bucket, obj string, size int64, acct auth.Accou
 	if doChown {
 		err := f.Chown(uid, gid)
 		if err != nil {
+			f.Close()
 			return nil, fmt.Errorf("set temp file ownership: %w", err)
 		}
 	}
@@ -141,6 +142,8 @@ func (p *Posix) openMkTemp(dir, bucket, obj string, size int64, dofalloc bool, u
 	if doChown {
 		err := f.Chown(uid, gid)
 		if err != nil {
+			f.Close()
+			os.Remove(f.Name())
 			return nil, fmt.Errorf("set temp file ownership: %w", err)
 		}
 	}
diff --git a/backend/posix/without_otmpfile.go b/backend/posix/without_otmpfile.go
index 3b144539..7fb35e9d 100644
--- a/backend/posix/without_otmpfile.go
+++ b/backend/posix/without_otmpfile.go
@@ -61,6 +61,8 @@ func (p *Posix) openTmpFile(dir, bucket, obj string, size int64, acct auth.Accou
 	if doChown {
 		err := f.Chown(uid, gid)
 		if err != nil {
+			f.Close()
+			os.Remove(f.Name())
 			return nil, fmt.Errorf("set temp file ownership: %w", err)
 		}
 	}