diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 78d230ef92..75b76685e0 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -1111,13 +1111,6 @@ bool cmMoveFile(std::wstring const& oldname, std::wstring const& newname,
 }
 #endif
 
-bool cmSystemTools::CopySingleFile(const std::string& oldname,
-                                   const std::string& newname)
-{
-  return cmSystemTools::CopySingleFile(oldname, newname, CopyWhen::Always) ==
-    CopyResult::Success;
-}
-
 cmSystemTools::CopyResult cmSystemTools::CopySingleFile(
   std::string const& oldname, std::string const& newname, CopyWhen when,
   std::string* err)
diff --git a/Source/cmSystemTools.h b/Source/cmSystemTools.h
index 87b354c8de..f2b3dd2469 100644
--- a/Source/cmSystemTools.h
+++ b/Source/cmSystemTools.h
@@ -177,8 +177,6 @@ public:
                                          const mode_t* mode = nullptr);
 
   /** Copy a file. */
-  static bool CopySingleFile(const std::string& oldname,
-                             const std::string& newname);
   static CopyResult CopySingleFile(std::string const& oldname,
                                    std::string const& newname, CopyWhen when,
                                    std::string* err = nullptr);