diff --git a/glow/util.cpp b/glow/util.cpp
index 005df9d..e8a5747 100644
--- a/glow/util.cpp
+++ b/glow/util.cpp
@@ -25,6 +25,8 @@
 #ifdef _WIN32
 #define NOMINMAX
 #include <Windows.h>
+#else
+#include <iostream>
 #endif
 
 namespace glow