diff --git a/engine.go b/engine.go
index caf1dbe4..32924e9a 100644
--- a/engine.go
+++ b/engine.go
@@ -461,7 +461,7 @@ func (engine *Engine) Incr(column string, arg ...interface{}) *Session {
 	return session.Incr(column, arg...)
 }
 
-// Method Inc provides a update string like "column = column - ?"
+// Method Decr provides a update string like "column = column - ?"
 func (engine *Engine) Decr(column string, arg ...interface{}) *Session {
 	session := engine.NewSession()
 	session.IsAutoClose = true
diff --git a/session.go b/session.go
index a84f6429..f0a345b2 100644
--- a/session.go
+++ b/session.go
@@ -146,7 +146,7 @@ func (session *Session) Incr(column string, arg ...interface{}) *Session {
 	return session
 }
 
-// Method In provides a query string like "count = count - 1"
+// Method Decr provides a query string like "count = count - 1"
 func (session *Session) Decr(column string, arg ...interface{}) *Session {
 	session.Statement.Decr(column, arg...)
 	return session