Index: tol/bbasic/sys.cpp
===================================================================
--- tol/bbasic/sys.cpp	(revision c320946b363086f3e7368e42d7d24152784f95a2)
+++ tol/bbasic/sys.cpp	(revision a52bf166596d88164c45c1e4b5dc8d0eec17fc6d)
@@ -1076,5 +1076,5 @@
 {
 //boost::this_thread::sleep( boost::posix_time::milliseconds(milliseconds) );
-#ifdef _MSC_VER
+#ifdef WIN32
   Sleep(milliseconds);
 #else