diff --git a/internal/bodyprocessors/multipart.go b/internal/bodyprocessors/multipart.go
index 5e7cb554..ded38b2b 100644
--- a/internal/bodyprocessors/multipart.go
+++ b/internal/bodyprocessors/multipart.go
@@ -65,6 +65,7 @@ func (mbp *multipartBodyProcessor) ProcessRequest(reader io.Reader, v plugintype
 					v.MultipartStrictError().(*collections.Single).Set("1")
 					return err
 				}
+				defer temp.Close()
 				sz, err := io.Copy(temp, p)
 				if err != nil {
 					v.MultipartStrictError().(*collections.Single).Set("1")