diff --git a/lldb/source/Target/ThreadPlan.cpp b/lldb/source/Target/ThreadPlan.cpp
index f2d7a18..80852b7 100644
--- a/lldb/source/Target/ThreadPlan.cpp
+++ b/lldb/source/Target/ThreadPlan.cpp
@@ -22,6 +22,7 @@
 #include "lldb/Target/Thread.h"
 #include "lldb/Target/Process.h"
 #include "lldb/Target/Target.h"
+#include "lldb/Utility/ConvertEnum.h"
 
 using namespace lldb;
 using namespace lldb_private;