diff --git a/src/tsserverlibrary/tsserverlibrary.ts b/src/tsserverlibrary/tsserverlibrary.ts
index e69de29bb2d1d..b472a38a3a73a 100644
--- a/src/tsserverlibrary/tsserverlibrary.ts
+++ b/src/tsserverlibrary/tsserverlibrary.ts
@@ -0,0 +1 @@
+namespace ts.server {} // empty ts module so the module migration script knows this file depends on the `ts` project namespace