1 files changed, 1 insertions, 4 deletions
diff --git a/Source/cmGeneratorExpressionLexer.h b/Source/cmGeneratorExpressionLexer.h
index 9e01948..a4321d1 100644
--- a/Source/cmGeneratorExpressionLexer.h
+++ b/Source/cmGeneratorExpressionLexer.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 cmGeneratorExpressionLexer_h
-#define cmGeneratorExpressionLexer_h
+#pragma once
 
 #include "cmConfigure.h" // IWYU pragma: keep
 
@@ -49,5 +48,3 @@ private:
   bool SawBeginExpression = false;
   bool SawGeneratorExpression = false;
 };
-
-#endif