diff --git a/source/gui/msgbox.cpp b/source/gui/msgbox.cpp
index 5b94ab89..4d4ffc36 100644
--- a/source/gui/msgbox.cpp
+++ b/source/gui/msgbox.cpp
@@ -12,7 +12,7 @@
  *		James Bremner
  *		Ariel Vina-Rodriguez
  */
-
+#define NOMINMAX
 #include <algorithm>  // max
 #include <functional>
 #include <cstdlib>    //include std::abs