diff --git a/package/system/mtd/src/trx.c b/package/system/mtd/src/trx.c
index 86d62fc..089d1ac 100644
--- a/package/system/mtd/src/trx.c
+++ b/package/system/mtd/src/trx.c
@@ -101,6 +101,7 @@ err:
 	return -1;
 }
 
+#ifndef target_ar71xx
 int
 trx_check(int imagefd, const char *mtd, char *buf, int *len)
 {
@@ -141,6 +142,7 @@ trx_check(int imagefd, const char *mtd, char *buf, int *len)
 	close(fd);
 	return 1;
 }
+#endif
 
 int
 mtd_fixtrx(const char *mtd, size_t offset)