diff --git a/common/common.go b/common/common.go
index 3acee88e..875cc56d 100644
--- a/common/common.go
+++ b/common/common.go
@@ -7,8 +7,8 @@ import (
 )
 
 var (
-	ErrorAlreadyReleased = errors.New("Object already released.")
-	ErrBadConfiguration  = errors.New("Bad configuration.")
+	ErrObjectReleased   = errors.New("Object already released.")
+	ErrBadConfiguration = errors.New("Bad configuration.")
 )
 
 // Releasable interface is for those types that can release its members.
diff --git a/common/crypto/io.go b/common/crypto/io.go
index f5a79b28..cf4d4bba 100644
--- a/common/crypto/io.go
+++ b/common/crypto/io.go
@@ -21,7 +21,7 @@ func NewCryptionReader(stream cipher.Stream, reader io.Reader) *CryptionReader {
 
 func (this *CryptionReader) Read(data []byte) (int, error) {
 	if this.reader == nil {
-		return 0, common.ErrorAlreadyReleased
+		return 0, common.ErrObjectReleased
 	}
 	nBytes, err := this.reader.Read(data)
 	if nBytes > 0 {
@@ -49,7 +49,7 @@ func NewCryptionWriter(stream cipher.Stream, writer io.Writer) *CryptionWriter {
 
 func (this *CryptionWriter) Write(data []byte) (int, error) {
 	if this.writer == nil {
-		return 0, common.ErrorAlreadyReleased
+		return 0, common.ErrObjectReleased
 	}
 	this.stream.XORKeyStream(data, data)
 	return this.writer.Write(data)