Move USleep to utils/
diff --git a/examples/HelloTriangle.cpp b/examples/HelloTriangle.cpp
index 3a73242..c5335b5 100644
--- a/examples/HelloTriangle.cpp
+++ b/examples/HelloTriangle.cpp
@@ -15,6 +15,7 @@
 #include "SampleUtils.h"
 
 #include "utils/NXTHelpers.h"
+#include "utils/SystemUtils.h"
 
 #include <vector>
 
@@ -166,7 +167,7 @@
 
     while (!ShouldQuit()) {
         frame();
-        USleep(16000);
+        utils::USleep(16000);
     }
 
     // TODO release stuff