diff --git a/cpu/mips/start.S b/cpu/mips/start.S
index fde2944..0ecdd83 100644
--- a/cpu/mips/start.S
+++ b/cpu/mips/start.S
@@ -211,6 +211,9 @@
 	mtc0	zero, CP0_WATCHLO
 	mtc0	zero, CP0_WATCHHI
 
+	/* WP(Watch Pending), SW0/1 should be cleared. */
+	mtc0	zero, CP0_CAUSE
+
 	/* STATUS register */
 #ifdef  CONFIG_TB0229
 	li	k0, ST0_CU0
@@ -221,9 +224,6 @@
 	and	k0, k1
 	mtc0	k0, CP0_STATUS
 
-	/* CAUSE register */
-	mtc0	zero, CP0_CAUSE
-
 	/* Init Timer */
 	mtc0	zero, CP0_COUNT
 	mtc0	zero, CP0_COMPARE