diff --git a/object/wellknown_attributes.go b/object/wellknown_attributes.go
index 9e1793e..c1fc833 100644
--- a/object/wellknown_attributes.go
+++ b/object/wellknown_attributes.go
@@ -13,7 +13,7 @@ const (
 	// user-defined local time of object creation in Unix Timestamp format.
 	AttributeTimestamp = "Timestamp"
 
-	// AttributeTimestamp is an attribute key that is commonly used to denote
+	// AttributeContentType is an attribute key that is commonly used to denote
 	// MIME Content Type of object's payload.
 	AttributeContentType = "Content-Type"
 )