diff --git a/src/support/os_win32.cpp b/src/support/os_win32.cpp
index 82e57d2eb6..64432e5a7c 100644
--- a/src/support/os_win32.cpp
+++ b/src/support/os_win32.cpp
@@ -33,6 +33,7 @@
 
 #include <cstdlib>
 #include <vector>
+#include <ostream>
 
 #include <QString>