Unblock buildbot.

llvm-svn: 186133

diff --git a/lldb/source/Symbol/ClangASTContext.cpp b/lldb/source/Symbol/ClangASTContext.cpp
index b5c658dab8625b67b6ab7aa26c2fe9ffe2a49527..5ba9c6a8d7968332a05737f5e7df2902af176281 100644 (file)
--- a/lldb/source/Symbol/ClangASTContext.cpp
+++ b/lldb/source/Symbol/ClangASTContext.cpp
@@ -70,9 +70,10 @@
 #include "lldb/Target/Process.h"
 #include "lldb/Target/ObjCLanguageRuntime.h"
 
-
 #include <stdio.h>
 
+#include <mutex>
+
 using namespace lldb;
 using namespace lldb_private;
 using namespace llvm;