diff --git a/src/server/server.ts b/src/server/server.ts
index fb0b3b781a..5330b5721c 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -573,7 +573,7 @@ namespace ts.server {
         }
 
         private writeToEventSocket(body: any, eventName: string): void {
-            this.eventSocket.write(formatMessage(toEvent(body, eventName), this.logger, this.byteLength, this.host.newLine), "utf8");
+            this.eventSocket.write(formatMessage(toEvent(eventName, body), this.logger, this.byteLength, this.host.newLine), "utf8");
         }
 
         exit() {