diff --git a/Core/timing.c b/Core/timing.c
index 5328007..c0cd170 100644
--- a/Core/timing.c
+++ b/Core/timing.c
@@ -61,8 +61,9 @@ void GB_timing_sync(GB_gameboy_t *gb)
 
     uint64_t target_nanoseconds = gb->cycles_since_last_sync * 1000000000LL / 2 / GB_get_clock_rate(gb); /* / 2 because we use 8MHz units */
     int64_t nanoseconds = get_nanoseconds();
-    if (labs((signed long)(nanoseconds - gb->last_sync)) < target_nanoseconds ) {
-        nsleep(target_nanoseconds  + gb->last_sync - nanoseconds);
+    int64_t time_to_sleep = target_nanoseconds + gb->last_sync - nanoseconds;
+    if (time_to_sleep > 0 && time_to_sleep < LCDC_PERIOD * 1000000000LL / GB_get_clock_rate(gb)) {
+        nsleep(time_to_sleep);
         gb->last_sync += target_nanoseconds;
     }
     else {