diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
index 42ee2b1831bbceb35674763c985d13389d511602..29cd01987c32cc55f666ce6177e6b1b85e960bff 100644
--- a/arch/blackfin/mach-common/head.S
+++ b/arch/blackfin/mach-common/head.S
@@ -170,12 +170,8 @@ ENTRY(__start)
 	[p0] = p1;
 	csync;
 
-	p0.l = lo(IMASK);
-	p0.h = hi(IMASK);
-	p1.l = IMASK_IVG15;
-	p1.h = 0x0;
-	[p0] = p1;
-	csync;
+	r0 = EVT_IVG15 (z);
+	sti r0;
 
 	raise 15;
 	p0.l = .LWAIT_HERE;