diff --git a/llvm/lib/Debuginfod/Debuginfod.cpp b/llvm/lib/Debuginfod/Debuginfod.cpp
index ef4e11ca3..29fdd6ffb 100644
--- a/llvm/lib/Debuginfod/Debuginfod.cpp
+++ b/llvm/lib/Debuginfod/Debuginfod.cpp
@@ -40,6 +40,7 @@
 #include "llvm/Support/xxhash.h"
 
 #include <atomic>
+#include <thread>
 
 namespace llvm {
 static std::string uniqueKey(llvm::StringRef S) { return utostr(xxHash64(S)); }