diff --git a/Source/Core/InputCommon/ControllerInterface/DInput/DInput.h b/Source/Core/InputCommon/ControllerInterface/DInput/DInput.h
index 1772b32817..419a942cb4 100644
--- a/Source/Core/InputCommon/ControllerInterface/DInput/DInput.h
+++ b/Source/Core/InputCommon/ControllerInterface/DInput/DInput.h
@@ -8,6 +8,7 @@
 
 #include <windows.h>
 #include <list>
+#include <string>
 
 #include "InputCommon/ControllerInterface/DInput/DInput8.h"