diff --git a/backend/backend.go b/backend/backend.go
index 18f5342..11edb4a 100644
--- a/backend/backend.go
+++ b/backend/backend.go
@@ -51,7 +51,7 @@ type Backend interface {
 	GetObject(bucket, object, acceptRange string, writer io.Writer) (*s3.GetObjectOutput, error)
 	GetObjectAcl(bucket, object string) (*s3.GetObjectAclOutput, error)
 	GetObjectAttributes(bucket, object string, attributes []string) (*s3.GetObjectAttributesOutput, error)
-	CopyObject(srcBucket, srcObject, DstBucket, dstObject string) (*s3.CopyObjectOutput, error)
+	CopyObject(srcBucket, srcObject, dstBucket, dstObject string) (*s3.CopyObjectOutput, error)
 	ListObjects(bucket, prefix, marker, delim string, maxkeys int) (*s3.ListObjectsOutput, error)
 	ListObjectsV2(bucket, prefix, marker, delim string, maxkeys int) (*s3.ListObjectsV2Output, error)
 	DeleteObject(bucket, object string) error
diff --git a/backend/posix/posix.go b/backend/posix/posix.go
index c7e7b9b..ff587b6 100644
--- a/backend/posix/posix.go
+++ b/backend/posix/posix.go
@@ -978,8 +978,7 @@ func (p *Posix) HeadObject(bucket, object string) (*s3.HeadObjectOutput, error)
 	}, nil
 }
 
-func (p *Posix) CopyObject(srcBucket, srcObject, DstBucket, dstObject string) (*s3.CopyObjectOutput, error) {
-	fmt.Println(srcBucket, srcObject, DstBucket, dstObject)
+func (p *Posix) CopyObject(srcBucket, srcObject, dstBucket, dstObject string) (*s3.CopyObjectOutput, error) {
 	_, err := os.Stat(srcBucket)
 	if errors.Is(err, fs.ErrNotExist) {
 		return nil, s3err.GetAPIError(s3err.ErrNoSuchBucket)
@@ -988,7 +987,7 @@ func (p *Posix) CopyObject(srcBucket, srcObject, DstBucket, dstObject string) (*
 		return nil, fmt.Errorf("stat bucket: %w", err)
 	}
 
-	_, err = os.Stat(DstBucket)
+	_, err = os.Stat(dstBucket)
 	if errors.Is(err, fs.ErrNotExist) {
 		return nil, s3err.GetAPIError(s3err.ErrNoSuchBucket)
 	}
@@ -1011,12 +1010,12 @@ func (p *Posix) CopyObject(srcBucket, srcObject, DstBucket, dstObject string) (*
 		return nil, fmt.Errorf("stat object: %w", err)
 	}
 
-	etag, err := p.PutObject(&s3.PutObjectInput{Bucket: &DstBucket, Key: &dstObject, Body: f, ContentLength: fInfo.Size()})
+	etag, err := p.PutObject(&s3.PutObjectInput{Bucket: &dstBucket, Key: &dstObject, Body: f, ContentLength: fInfo.Size()})
 	if err != nil {
 		return nil, err
 	}
 
-	fi, err := os.Stat(filepath.Join(DstBucket, dstObject))
+	fi, err := os.Stat(filepath.Join(dstBucket, dstObject))
 	if err != nil {
 		return nil, fmt.Errorf("stat dst object: %w", err)
 	}