diff --git a/package/lean/kcptun/Makefile b/package/lean/kcptun/Makefile
index ce3e99c989..d7f795f565 100644
--- a/package/lean/kcptun/Makefile
+++ b/package/lean/kcptun/Makefile
@@ -46,7 +46,7 @@ endef
 
 define Build/Prepare
 	tar -xzvf $(DL_DIR)/$(PKG_SOURCE) -C $(PKG_BUILD_DIR)
-	[ -f $(PKG_BUILD_DIR)/client_linux_arm6 ] mv $(PKG_BUILD_DIR)/client_linux_arm6 $(PKG_BUILD_DIR)/client_linux_arm
+	if [ -f $(PKG_BUILD_DIR)/client_linux_arm6 ]; then mv -f $(PKG_BUILD_DIR)/client_linux_arm6 $(PKG_BUILD_DIR)/client_linux_arm; fi
 endef
 
 define Build/Configure
@@ -60,4 +60,4 @@ define Package/$(PKG_NAME)/install
 	$(INSTALL_BIN) $(PKG_BUILD_DIR)/client_linux_$(PKG_ARCH_KCPTUN) $(1)/usr/bin/ssr-kcptun
 endef
 
-$(eval $(call BuildPackage,$(PKG_NAME)))
\ No newline at end of file
+$(eval $(call BuildPackage,$(PKG_NAME)))