diff --git a/Source/cmGlobalVisualStudio10Generator.cxx b/Source/cmGlobalVisualStudio10Generator.cxx
index ee9e47ab3c..0e02b0a9f8 100644
--- a/Source/cmGlobalVisualStudio10Generator.cxx
+++ b/Source/cmGlobalVisualStudio10Generator.cxx
@@ -647,9 +647,9 @@ bool cmGlobalVisualStudio10Generator::FindVCTargetsPath(cmMakefile* mf)
      xw.EndElement(); // ItemGroup
     xw.StartElement("PropertyGroup");
      xw.Attribute("Label", "Globals");
-     xw.StartElement("ProjectGUID");
+     xw.StartElement("ProjectGuid");
       xw.Content("{F3FC6D86-508D-3FB1-96D2-995F08B142EC}");
-     xw.EndElement(); // ProjectGUID
+     xw.EndElement(); // ProjectGuid
      xw.StartElement("Keyword");
       xw.Content("Win32Proj");
      xw.EndElement(); // Keyword
diff --git a/Source/cmVisualStudio10TargetGenerator.cxx b/Source/cmVisualStudio10TargetGenerator.cxx
index c81ba7aa42..4fcf5dc53e 100644
--- a/Source/cmVisualStudio10TargetGenerator.cxx
+++ b/Source/cmVisualStudio10TargetGenerator.cxx
@@ -297,8 +297,8 @@ void cmVisualStudio10TargetGenerator::Generate()
     this->WriteProjectConfigurations();
   }
   this->WriteString("<PropertyGroup Label=\"Globals\">\n", 1);
-  this->WriteString("<ProjectGUID>", 2);
-  (*this->BuildFileStream) << "{" << this->GUID << "}</ProjectGUID>\n";
+  this->WriteString("<ProjectGuid>", 2);
+  (*this->BuildFileStream) << "{" << this->GUID << "}</ProjectGuid>\n";
 
   if (this->MSTools &&
       this->GeneratorTarget->GetType() <= cmStateEnums::GLOBAL_TARGET) {