diff --git a/package/system/mtd/src/trx.c b/package/system/mtd/src/trx.c
index 089d1ace46..245ee7630a 100644
--- a/package/system/mtd/src/trx.c
+++ b/package/system/mtd/src/trx.c
@@ -26,6 +26,7 @@
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
+#include <endian.h>
 #include <string.h>
 #include <errno.h>