diff --git a/core/hw/sh4/sh4_sched.cpp b/core/hw/sh4/sh4_sched.cpp
index 516bee912..c64f49bf9 100755
--- a/core/hw/sh4/sh4_sched.cpp
+++ b/core/hw/sh4/sh4_sched.cpp
@@ -36,11 +36,11 @@ vector<sched_list> list;
 
 int sh4_sched_next_id=-1;
 
-u32 sh4_sched_remaining(int id)
+u32 sh4_sched_remaining(int id, u32 reference)
 {
-	if (list[id].end!=-1)
+	if (list[id].end != -1)
 	{
-		return list[id].end-sh4_sched_now();
+		return list[id].end - reference;
 	}
 	else
 	{
@@ -48,6 +48,11 @@ u32 sh4_sched_remaining(int id)
 	}
 }
 
+u32 sh4_sched_remaining(int id)
+{
+	return sh4_sched_remaining(id, sh4_sched_now());
+}
+
 void sh4_sched_ffts()
 {
 	u32 diff=-1;
@@ -150,8 +155,9 @@ void sh4_sched_tick(int cycles)
 		{
 			for (int i=0;i<list.size();i++)
 			{
-				if ((list[i].end-fztime)<=(u32)cycles)
-				{
+				int remaining = sh4_sched_remaining(i, fztime);
+				verify(remaining >= 0 || remaining == -1);
+				if (remaining >= 0 && remaining <= (u32)cycles) {
 					handle_cb(i);
 				}
 			}