diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 4813d4b4300..eb9f1e3cf34 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -151,7 +151,7 @@ namespace ts {
             },
             showInSimplifiedHelpView: true,
             category: Diagnostics.Basic_Options,
-            description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+            description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation
         },
         {
             name: "allowJs",
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index cf5ccb1397d..785ac6f953b 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3015,7 +3015,7 @@
         "category": "Message",
         "code": 6078
     },
-    "Specify library files to be included in the compilation: ": {
+    "Specify library files to be included in the compilation.": {
         "category": "Message",
         "code": 6079
     },