diff --git a/Source/cmGlobalXCodeGenerator.cxx b/Source/cmGlobalXCodeGenerator.cxx
index 0561a0542..be40c66df 100644
--- a/Source/cmGlobalXCodeGenerator.cxx
+++ b/Source/cmGlobalXCodeGenerator.cxx
@@ -591,6 +591,20 @@ void cmGlobalXCodeGenerator::CreateReRunCMakeFile(
                    mf->GetHomeOutputDirectory()) << "\n";
 }
 
+//----------------------------------------------------------------------------
+
+static bool objectIdLessThan(cmXCodeObject* l, cmXCodeObject* r)
+{
+  return l->GetId() < r->GetId();
+}
+
+//----------------------------------------------------------------------------
+void cmGlobalXCodeGenerator::SortXCodeObjects()
+{
+  std::sort(this->XCodeObjects.begin(), this->XCodeObjects.end(),
+            objectIdLessThan);
+}
+
 //----------------------------------------------------------------------------
 void cmGlobalXCodeGenerator::ClearXCodeObjects()
 {
@@ -3713,6 +3727,8 @@ cmGlobalXCodeGenerator::WriteXCodePBXProj(std::ostream& fout,
                                           cmLocalGenerator* ,
                                           std::vector<cmLocalGenerator*>& )
 {
+  SortXCodeObjects();
+
   fout << "// !$*UTF8*$!\n";
   fout << "{\n";
   cmXCodeObject::Indent(1, fout);
diff --git a/Source/cmGlobalXCodeGenerator.h b/Source/cmGlobalXCodeGenerator.h
index b272f6a94..1a69fce82 100644
--- a/Source/cmGlobalXCodeGenerator.h
+++ b/Source/cmGlobalXCodeGenerator.h
@@ -150,6 +150,7 @@ private:
                            cmXCodeObject* buildSettings,
                            const std::string& buildType);
   std::string ExtractFlag(const char* flag, std::string& flags);
+  void SortXCodeObjects();
   // delete all objects in the this->XCodeObjects vector.
   void ClearXCodeObjects();
   bool CreateXCodeObjects(cmLocalGenerator* root,