diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index e4c4edcb4db61..6f1d633eadaff 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -697,14 +697,14 @@ namespace ts {
             type: "boolean",
             affectsSemanticDiagnostics: true,
             category: Diagnostics.Advanced_Options,
-            description: Diagnostics.Do_not_report_errors_on_unused_labels
+            description: Diagnostics.Controls_showing_errors_for_unused_labels_true_Colon_Never_show_errors_false_Colon_Always_show_errors_unspecified_Colon_Show_errors_in_editor_but_not_command_line,
         },
         {
             name: "allowUnreachableCode",
             type: "boolean",
             affectsSemanticDiagnostics: true,
             category: Diagnostics.Advanced_Options,
-            description: Diagnostics.Do_not_report_errors_on_unreachable_code
+            description: Diagnostics.Controls_showing_errors_for_unreachable_code_true_Colon_Never_show_errors_false_Colon_Always_show_errors_unspecified_Colon_Show_errors_in_editor_but_not_command_line,
         },
         {
             name: "suppressExcessPropertyErrors",
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 9ba3c4e8cf150..844c0973d78cf 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3150,7 +3150,7 @@
         "category": "Message",
         "code": 6073
     },
-    "Do not report errors on unused labels.": {
+    "Controls showing errors for unused labels. 'true': Never show errors; 'false': Always show errors; unspecified: Show errors in editor, but not command line.": {
         "category": "Message",
         "code": 6074
     },
@@ -3162,7 +3162,7 @@
         "category": "Message",
         "code": 6076
     },
-    "Do not report errors on unreachable code.": {
+    "Controls showing errors for unreachable code. 'true': Never show errors; 'false': Always show errors; unspecified: Show errors in editor, but not command line.": {
         "category": "Message",
         "code": 6077
     },