diff --git a/request.go b/request.go
index 7a5942a..79f69f4 100644
--- a/request.go
+++ b/request.go
@@ -1102,7 +1102,7 @@ func (r *Request) EnableForceMultipart() *Request {
 
 // DisableForceMultipart disables force using multipart to upload form data.
 func (r *Request) DisableForceMultipart() *Request {
-	r.isMultiPart = true
+	r.isMultiPart = false
 	return r
 }