diff --git a/Source/cmFileTimes.h b/Source/cmFileTimes.h
index 191d89e..f1916f7 100644
--- a/Source/cmFileTimes.h
+++ b/Source/cmFileTimes.h
@@ -1,7 +1,6 @@
 /* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
    file Copyright.txt or https://cmake.org/licensing for details.  */
-#ifndef cmFileTimes_h
-#define cmFileTimes_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -36,5 +35,3 @@
   class Times;
   std::unique_ptr<Times> times;
 };
-
-#endif