diff --git a/libprof.c b/libprof.c
index 017a9ac..b0e98f3 100644
--- a/libprof.c
+++ b/libprof.c
@@ -17,7 +17,7 @@ int prof_init(void)
 	int timer = -1;
 	for(int t = 2; t >= 0 && timer == -1; t--)
 	{
-		timer = timer_setup(t, 0xffffffff, NULL);
+		timer = timer_setup(t | TIMER_Pphi_4, 0xffffffff, NULL);
 	}
 	if(timer == -1)
 	{