diff -r 90acc64a428a -r 765dd2eea07c src/if_sniff.c
--- a/src/if_sniff.c	Thu Aug 13 23:30:04 2015 +0200
+++ b/src/if_sniff.c	Tue Aug 25 18:14:46 2015 +0200
@@ -655,7 +655,11 @@
     else
     {
 #ifdef WIN32
+#if (defined(_MSC_VER) && _MSC_VER >= 1400)
+        Sleep(2);
+#else
 	_sleep(2);
+#endif
 	if (!sniff_request_processed)
 	    ProcessSniffRequests();
 #else