diff --git a/Templates/MSBuild/FlagTables/v142_CL.json b/Templates/MSBuild/FlagTables/v142_CL.json
index 479df034d1..95b9d14f61 100644
--- a/Templates/MSBuild/FlagTables/v142_CL.json
+++ b/Templates/MSBuild/FlagTables/v142_CL.json
@@ -833,10 +833,17 @@
   {
     "name": "ConformanceMode",
     "switch": "permissive-",
-    "comment": "Conformance mode",
+    "comment": "Conformance mode enabled",
     "value": "true",
     "flags": []
   },
+  {
+    "name": "ConformanceMode",
+    "switch": "permissive",
+    "comment": "Conformance mode disabled",
+    "value": "false",
+    "flags": []
+  },
   {
     "name": "TreatWChar_tAsBuiltInType",
     "switch": "Zc:wchar_t-",