1 files changed, 1 insertions, 4 deletions
diff --git a/Source/cmTimestamp.h b/Source/cmTimestamp.h
index 40338f8b2..8941abe1c 100644
--- a/Source/cmTimestamp.h
+++ b/Source/cmTimestamp.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 cmTimestamp_h
-#define cmTimestamp_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -30,5 +29,3 @@ private:
   std::string AddTimestampComponent(char flag, struct tm& timeStruct,
                                     time_t timeT) const;
 };
-
-#endif