diff --git a/src/tsc/tsc.ts b/src/tsc/tsc.ts
index 1685dfc3449..3e0b9a631f8 100644
--- a/src/tsc/tsc.ts
+++ b/src/tsc/tsc.ts
@@ -208,6 +208,7 @@ namespace ts {
             },
             {
                 name: "watch",
+                shortName:"w",
                 category: Diagnostics.Command_line_Options,
                 description: Diagnostics.Watch_input_files,
                 type: "boolean"