diff --git a/clang/include/clang/Serialization/SourceLocationEncoding.h b/clang/include/clang/Serialization/SourceLocationEncoding.h
index c56ce06ab8c2b..ff16a122e4960 100644
--- a/clang/include/clang/Serialization/SourceLocationEncoding.h
+++ b/clang/include/clang/Serialization/SourceLocationEncoding.h
@@ -26,6 +26,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include <climits>
 #include "clang/Basic/SourceLocation.h"
 
 #ifndef LLVM_CLANG_SERIALIZATION_SOURCELOCATIONENCODING_H
diff --git a/clang/unittests/Serialization/SourceLocationEncodingTest.cpp b/clang/unittests/Serialization/SourceLocationEncodingTest.cpp
index bac43a21d1ec2..3839def0c6005 100644
--- a/clang/unittests/Serialization/SourceLocationEncodingTest.cpp
+++ b/clang/unittests/Serialization/SourceLocationEncodingTest.cpp
@@ -9,6 +9,7 @@
 #include "clang/Serialization/SourceLocationEncoding.h"
 
 #include "gtest/gtest.h"
+#include <climits>
 
 using namespace llvm;
 using namespace clang;