diff --git a/lldb/unittests/Symbol/PostfixExpressionTest.cpp b/lldb/unittests/Symbol/PostfixExpressionTest.cpp
--- a/lldb/unittests/Symbol/PostfixExpressionTest.cpp
+++ b/lldb/unittests/Symbol/PostfixExpressionTest.cpp
@@ -9,6 +9,7 @@
 #include "lldb/Symbol/PostfixExpression.h"
 #include "lldb/Utility/DataExtractor.h"
 #include "lldb/Utility/StreamString.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/DebugInfo/DIContext.h"
 #include "llvm/DebugInfo/DWARF/DWARFExpression.h"
 #include "llvm/Support/FormatVariadic.h"
diff --git a/lldb/unittests/SymbolFile/NativePDB/UdtRecordCompleterTests.cpp b/lldb/unittests/SymbolFile/NativePDB/UdtRecordCompleterTests.cpp
--- a/lldb/unittests/SymbolFile/NativePDB/UdtRecordCompleterTests.cpp
+++ b/lldb/unittests/SymbolFile/NativePDB/UdtRecordCompleterTests.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "Plugins/SymbolFile/NativePDB/UdtRecordCompleter.h"
+#include "llvm/ADT/StringExtras.h"
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"