diff --git a/src/ClpSolve.cpp b/src/ClpSolve.cpp
index 83ff51c6..7130830f 100644
--- a/src/ClpSolve.cpp
+++ b/src/ClpSolve.cpp
@@ -12,15 +12,6 @@
 #endif
 
 #include <math.h>
-#ifdef _MSC_VER
-#define NOMINMAX
-#include <windows.h> // for Sleep()
-#ifdef small
-#undef small
-#endif
-#else
-#include <unistd.h> // for usleep()
-#endif
 
 #include "CoinHelperFunctions.hpp"
 #include "ClpHelperFunctions.hpp"