diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 2b4b896ad..02115918c 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -541,6 +541,15 @@ bool cmMakefile::ReadListFile(const char* filename_in,
                               const char *external_in,
                               bool noPolicyScope,
                               bool requireProjectCommand)
+{
+  return this->ReadListFileInternal(filename_in, external_in,
+                                    noPolicyScope, requireProjectCommand);
+}
+
+bool cmMakefile::ReadListFileInternal(const char* filename_in,
+                                      const char* external_in,
+                                      bool noPolicyScope,
+                                      bool requireProjectCommand)
 {
   std::string currentParentFile
     = this->GetSafeDefinition("CMAKE_PARENT_LIST_FILE");
diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index 3d925fa78..88faed924 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -991,6 +991,12 @@ protected:
 private:
   void Initialize();
 
+
+  bool ReadListFileInternal(const char* filename_in,
+                            const char* external_in,
+                            bool noPolicyScope,
+                            bool requireProjectCommand);
+
   bool ParseDefineFlag(std::string const& definition, bool remove);
 
   bool EnforceUniqueDir(const std::string& srcPath,