diff --git a/lld/include/lld/Core/TargetInfo.h b/lld/include/lld/Core/TargetInfo.h
index cb81eb86019f..42fd9b49c51f 100644
--- a/lld/include/lld/Core/TargetInfo.h
+++ b/lld/include/lld/Core/TargetInfo.h
@@ -12,6 +12,7 @@
 
 #include "lld/Core/Error.h"
 #include "lld/Core/LLVM.h"
+#include "lld/Core/range.h"
 #include "lld/Core/Reference.h"
 
 #include "lld/Driver/LinkerInput.h"
@@ -237,6 +238,24 @@ public:
     _llvmOptions.push_back(opt);
   }
 
+  /// This method adds undefined symbols specified by the -u option to the
+  /// to the list of undefined symbols known to the linker. This option
+  /// essentially forces an undefined symbol to be create.
+  void addUndefinedSymbol(StringRef symbolName) {
+    _undefinedSymbols.push_back(symbolName);
+  }
+
+  /// Iterators for symbols that appear on the command line
+  typedef std::vector<StringRef> StringRefVector;
+  typedef StringRefVector::iterator StringRefVectorIter;
+  typedef StringRefVector::const_iterator StringRefVectorConstIter;
+
+  /// Return the list of undefined symbols that are specified in the
+  /// linker command line, using the -u option.
+  range<const StringRef *> undefinedSymbols() const {
+    return _undefinedSymbols;
+  }
+
   /// After all set* methods are called, the Driver calls this method
   /// to validate that there are no missing options or invalid combinations
   /// of options.  If there is a problem, a description of the problem
@@ -340,6 +359,7 @@ protected:
   std::vector<LinkerInput> _inputFiles;
   std::vector<const char*> _llvmOptions;
   std::unique_ptr<Reader>  _yamlReader;
+  StringRefVector          _undefinedSymbols;
 
  private:
   /// Validate the subclass bits. Only called by validate.
diff --git a/lld/include/lld/ReaderWriter/ELFTargetInfo.h b/lld/include/lld/ReaderWriter/ELFTargetInfo.h
index b8f7da89fe9d..9163d88bfc46 100644
--- a/lld/include/lld/ReaderWriter/ELFTargetInfo.h
+++ b/lld/include/lld/ReaderWriter/ELFTargetInfo.h
@@ -12,7 +12,6 @@
 
 #include "lld/Core/PassManager.h"
 #include "lld/Core/Pass.h"
-#include "lld/Core/range.h"
 #include "lld/Core/TargetInfo.h"
 #include "lld/ReaderWriter/Reader.h"
 #include "lld/ReaderWriter/Writer.h"
@@ -155,22 +154,6 @@ public:
   /// Searches directories then calls appendInputFile()
   bool appendLibrary(StringRef libName);
 
-  /// adds undefined symbols that are specified in the command line
-  void addUndefinedSymbol(StringRef symbolName) {
-    _undefinedSymbols.push_back(symbolName);
-  }
-
-  /// Iterators for symbols that appear on the command line
-  typedef std::vector<StringRef> StringRefVector;
-  typedef StringRefVector::iterator StringRefVectorIter;
-  typedef StringRefVector::const_iterator StringRefVectorConstIter;
-
-  /// Return the list of undefined symbols that are specified in the
-  /// linker command line, using the -u option.
-  range<const StringRef *> undefinedSymbols() const {
-    return _undefinedSymbols;
-  }
-
 private:
   ELFTargetInfo() LLVM_DELETED_FUNCTION;
 protected:
@@ -197,7 +180,6 @@ protected:
   std::unique_ptr<Writer>            _writer;
   std::unique_ptr<Reader>            _linkerScriptReader;
   StringRef                          _dynamicLinkerPath;
-  StringRefVector                    _undefinedSymbols;
 };
 } // end namespace lld