diff --git a/crypto/gmapi/gmapi_skf_ec.c b/crypto/gmapi/gmapi_skf_ec.c
index 44c3d256..d54f243d 100644
--- a/crypto/gmapi/gmapi_skf_ec.c
+++ b/crypto/gmapi/gmapi_skf_ec.c
@@ -620,10 +620,7 @@ int i2d_ECCCIPHERBLOB(ECCCIPHERBLOB *a, unsigned char **pp)
 		return 0;
 	}
 
-	if ((ret = i2d_SM2CiphertextValue(cv, pp)) <= 0) {
-		return 0;
-	}
-
+	ret = i2d_SM2CiphertextValue(cv, pp));
 	SM2CiphertextValue_free(cv);
 	return ret;
 }