diff --git a/util/test/demos/gl/gl_unshared_context.cpp b/util/test/demos/gl/gl_unshared_context.cpp
index 23ebaac53..e4a637412 100644
--- a/util/test/demos/gl/gl_unshared_context.cpp
+++ b/util/test/demos/gl/gl_unshared_context.cpp
@@ -180,7 +180,7 @@ void main()
     }
 
     // wait 3 seconds to make sure texB becomes a persistent resource
-    Sleep(3000);
+    msleep(3000);
 
     while(Running())
     {