diff --git a/Sources/main.swift b/Sources/main.swift
index 40cdad9..a81676a 100644
--- a/Sources/main.swift
+++ b/Sources/main.swift
@@ -40,22 +40,16 @@ let keyMap = [
   SDLK_s : JoypadButton.BUTTON_B
 ]
 
+var timer = Date.now.addingTimeInterval(0.01666)
 var frame = Frame()
-let time: UnsafeMutablePointer<timespec> = UnsafeMutablePointer<timespec>.allocate(capacity: 1)
-clock_gettime(CLOCK_REALTIME, time)
-time.pointee.tv_nsec += Int(0.01666 * 1000000000)
 let bus = Bus(rom: rom, joypad1: joypad1) { ppu in 
     Render.render(ppu, frame: frame)
-
-    //wait here until 16.66 ms have passed
-    clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, time, nil)
-    var nextNSec = time.pointee.tv_nsec + Int(0.01666 * 1000000000)
-    if nextNSec > 999999999 {
-        nextNSec -= 999999999
-        time.pointee.tv_sec += 1
+    // wait here until 16.66 ms have passed
+    // i would use clock_nanosleep but that isn't available cross platform
+    if timer.timeIntervalSinceNow > 0 {
+        usleep(UInt32(timer.timeIntervalSinceNow * 1000000))
     }
-    time.pointee.tv_nsec = nextNSec
-
+    timer.addTimeInterval(0.01666)
     SDL_UpdateTexture(texture, nil, frame.data, 256 * 3)
     SDL_RenderCopy(canvas, texture, nil, nil)
     SDL_RenderPresent(canvas)
@@ -88,4 +82,3 @@ let bus = Bus(rom: rom, joypad1: joypad1) { ppu in
 let cpu = CPU(bus: bus)
 cpu.reset()
 cpu.run()
-time.deallocate()