diff --git a/sm4/ecb_sm4_arm64.s b/sm4/ecb_sm4_arm64.s
index fddb197..5c44749 100644
--- a/sm4/ecb_sm4_arm64.s
+++ b/sm4/ecb_sm4_arm64.s
@@ -3,8 +3,6 @@
 
 #include "textflag.h"
 
-#include "textflag.h"
-
 #define x V0
 #define y V1
 #define t0 V2