diff --git a/Source/cmVSSetupHelper.cxx b/Source/cmVSSetupHelper.cxx
index 969a2c2c1c..1b67611c92 100644
--- a/Source/cmVSSetupHelper.cxx
+++ b/Source/cmVSSetupHelper.cxx
@@ -164,17 +164,11 @@ bool cmVSSetupAPIHelper::GetVSInstanceInfo(
     return false;
   }
 
-  ULONGLONG ullVersion = 0;
   SmartBSTR bstrVersion;
   if (FAILED(pInstance->GetInstallationVersion(&bstrVersion))) {
     return false;
   } else {
     vsInstanceInfo.Version = std::wstring(bstrVersion);
-    if (FAILED(setupHelper->ParseVersion(bstrVersion, &ullVersion))) {
-      vsInstanceInfo.ullVersion = 0;
-    } else {
-      vsInstanceInfo.ullVersion = ullVersion;
-    }
   }
 
   // Reboot may have been required before the installation path was created.
@@ -316,7 +310,6 @@ bool cmVSSetupAPIHelper::EnumerateAndChooseVSInstance()
     chosenInstanceInfo.Version =
       std::wstring(envVSVersion.begin(), envVSVersion.end());
     chosenInstanceInfo.VCToolsetVersion = envVSVersion;
-    chosenInstanceInfo.ullVersion = std::stoi(envVSVersion);
     chosenInstanceInfo.IsWin10SDKInstalled = true;
     chosenInstanceInfo.IsWin81SDKInstalled = !envWindowsSdkDir81.empty();
     return true;
diff --git a/Source/cmVSSetupHelper.h b/Source/cmVSSetupHelper.h
index 61a3ac7f8d..b2ba08682a 100644
--- a/Source/cmVSSetupHelper.h
+++ b/Source/cmVSSetupHelper.h
@@ -88,7 +88,6 @@ struct VSInstanceInfo
   std::wstring VSInstallLocation;
   std::wstring Version;
   std::string VCToolsetVersion;
-  ULONGLONG ullVersion = 0; // A.B.C.D = (A<<48)|(B<<32)|(C<<16)|D
   bool IsWin10SDKInstalled = false;
   bool IsWin81SDKInstalled = false;