diff --git a/sys/arm/arm/locore.S b/sys/arm/arm/locore.S
index b465edc1994..e56a91c087c 100644
--- a/sys/arm/arm/locore.S
+++ b/sys/arm/arm/locore.S
@@ -110,7 +110,7 @@ from_ram:
 	nop
 #endif
 	adr	r7, Lunmapped
-	bic     r7, r7, #0xff000000
+	bic     r7, r7, #0xf0000000
 	orr     r7, r7, #PHYSADDR
 
 
@@ -144,7 +144,7 @@ Lunmapped:
 	ldmia	r4!, {r1,r2,r3}   /* # of sections, VA, PA|attr */
 	cmp	r1, #0
 	adrne	r5, 2b
-	bicne	r5, r5, #0xff000000
+	bicne	r5, r5, #0xf0000000
 	orrne	r5, r5, #PHYSADDR
 	movne	pc, r5