diff --git a/board/tqc/tqm85xx/tqm85xx.c b/board/tqc/tqm85xx/tqm85xx.c
index cda8208..c414344 100644
--- a/board/tqc/tqm85xx/tqm85xx.c
+++ b/board/tqc/tqm85xx/tqm85xx.c
@@ -315,8 +315,7 @@
 
 	/* Monitor protection ON by default */
 	flash_protect (FLAG_PROTECT_SET,
-		       CONFIG_SYS_MONITOR_BASE,
-		       CONFIG_SYS_MONITOR_BASE + monitor_flash_len - 1,
+		       CONFIG_SYS_MONITOR_BASE, 0xffffffff,
 		       &flash_info[CONFIG_SYS_MAX_FLASH_BANKS - 1]);
 
 	/* Environment protection ON by default */