diff --git a/lldb/source/Commands/CommandObjectThread.cpp b/lldb/source/Commands/CommandObjectThread.cpp
index 5cde70e..af11fa7b 100644
--- a/lldb/source/Commands/CommandObjectThread.cpp
+++ b/lldb/source/Commands/CommandObjectThread.cpp
@@ -17,6 +17,8 @@
 #include "lldb/Core/State.h"
 #include "lldb/Core/SourceManager.h"
 
+#include "lldb/Host/Host.h"
+
 #include "lldb/Interpreter/CommandInterpreter.h"
 #include "lldb/Interpreter/CommandReturnObject.h"