diff --git a/debug_win32.cpp b/debug_win32.cpp
index 6a93a8d5..5f10357b 100644
--- a/debug_win32.cpp
+++ b/debug_win32.cpp
@@ -21,6 +21,7 @@
 #include "./except.hpp"
 
 #include <windows.h>
+#include <iostream>
 
 
 ///////////////////////////////////////////////////////////////////////////////