diff --git a/src/CalcManager/pch.cpp b/src/CalcManager/pch.cpp
index 1da170eb..25c093ca 100644
--- a/src/CalcManager/pch.cpp
+++ b/src/CalcManager/pch.cpp
@@ -1,4 +1,4 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
-#include "pch.h"
+#include"pch.h"