diff --git a/cpu/sa1100/timer.c b/cpu/sa1100/timer.c
index 0207501..aea90ab 100644
--- a/cpu/sa1100/timer.c
+++ b/cpu/sa1100/timer.c
@@ -41,7 +41,7 @@ void reset_timer (void)
 
 ulong get_timer (ulong base)
 {
-	return get_timer_masked ();
+	return get_timer_masked () - base;
 }
 
 void set_timer (ulong t)