diff --git a/sm9/bn256/gfp2_g1_arm64.go b/sm9/bn256/gfp2_g1_arm64.go
index 91d1b90c..7fdf2b8b 100644
--- a/sm9/bn256/gfp2_g1_arm64.go
+++ b/sm9/bn256/gfp2_g1_arm64.go
@@ -3,8 +3,6 @@
 
 package bn256
 
-package bn256
-
 // gfP2 multiplication.
 //
 //go:noescape