diff --git a/llvm/lib/Demangle/MicrosoftDemangle.cpp b/llvm/lib/Demangle/MicrosoftDemangle.cpp
index c681d6e25b87..9239ec992cb2 100644
--- a/llvm/lib/Demangle/MicrosoftDemangle.cpp
+++ b/llvm/lib/Demangle/MicrosoftDemangle.cpp
@@ -23,7 +23,9 @@
 
 #include <array>
 #include <cctype>
+#include <cstdint>
 #include <cstdio>
+#include <string>
 #include <tuple>
 
 using namespace llvm;