diff --git a/Source/cmQtAutoGenerators.cxx b/Source/cmQtAutoGenerators.cxx
index ebe08b09cd..ee40e7a7a2 100644
--- a/Source/cmQtAutoGenerators.cxx
+++ b/Source/cmQtAutoGenerators.cxx
@@ -464,7 +464,7 @@ void cmQtAutoGenerators::Init()
       std::list<std::string>::iterator it = this->MocIncludes.begin();
       while (it != this->MocIncludes.end())
         {
-        if (this->StartsWith(*it, binDir))
+        if (cmsys::SystemTools::StringStartsWith(*it, binDir.c_str()))
           {
           sortedMocIncludes.push_back(*it);
           it = this->MocIncludes.erase(it);
@@ -477,7 +477,7 @@ void cmQtAutoGenerators::Init()
       it = this->MocIncludes.begin();
       while (it != this->MocIncludes.end())
         {
-        if (this->StartsWith(*it, srcDir))
+        if (cmsys::SystemTools::StringStartsWith(*it, srcDir.c_str()))
           {
           sortedMocIncludes.push_back(*it);
           it = this->MocIncludes.erase(it);
@@ -1365,21 +1365,3 @@ std::string cmQtAutoGenerators::Join(const std::vector<std::string>& lst,
     result.erase(result.end() - 1);
     return result;
 }
-
-
-bool cmQtAutoGenerators::StartsWith(const std::string& str,
-                                    const std::string& with)
-{
-  return (str.substr(0, with.length()) == with);
-}
-
-
-bool cmQtAutoGenerators::EndsWith(const std::string& str,
-                                  const std::string& with)
-{
-  if (with.length() > (str.length()))
-    {
-    return false;
-    }
-  return (str.substr(str.length() - with.length(), with.length()) == with);
-}
diff --git a/Source/cmQtAutoGenerators.h b/Source/cmQtAutoGenerators.h
index ab7b6ed225..d5a23ab27b 100644
--- a/Source/cmQtAutoGenerators.h
+++ b/Source/cmQtAutoGenerators.h
@@ -70,8 +70,6 @@ private:
   void Init();
 
   std::string Join(const std::vector<std::string>& lst, char separator);
-  bool EndsWith(const std::string& str, const std::string& with);
-  bool StartsWith(const std::string& str, const std::string& with);
 
   static void MergeUicOptions(std::vector<std::string> &opts,
                        const std::vector<std::string> &fileOpts, bool isQt5);