diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index 4280dc9835a..973bede3303 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -624,11 +624,6 @@ declare namespace ts.server.protocol {
          * The format options to use during formatting and other code editing features.
          */
         formatOptions?: FormatOptions;
-
-        /**
-         * If set to true - then all loose files will land into one inferred project
-         */
-        useOneInferredProject?: boolean;
     }
 
     /**