diff --git a/slideshow/source/inc/attributableshape.hxx b/slideshow/source/inc/attributableshape.hxx
index d903c3b2abbb..f250b60d0e6d 100644
--- a/slideshow/source/inc/attributableshape.hxx
+++ b/slideshow/source/inc/attributableshape.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_ATTRIBUTABLESHAPE_HXX
-#define INCLUDED_SLIDESHOW_SOURCE_INC_ATTRIBUTABLESHAPE_HXX
+#pragma once
 
 #include <memory>
 
@@ -215,6 +214,4 @@ namespace slideshow::internal
 
 }
 
-#endif // INCLUDED_SLIDESHOW_SOURCE_INC_ATTRIBUTABLESHAPE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/inc/expressionnode.hxx b/slideshow/source/inc/expressionnode.hxx
index 6f9139012e12..7e3e674a8814 100644
--- a/slideshow/source/inc/expressionnode.hxx
+++ b/slideshow/source/inc/expressionnode.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_EXPRESSIONNODE_HXX
-#define INCLUDED_SLIDESHOW_SOURCE_INC_EXPRESSIONNODE_HXX
+#pragma once
 
 /* Definition of ExpressionNode interface */
 
@@ -73,6 +72,4 @@ namespace slideshow::internal
 
 }
 
-#endif // INCLUDED_SLIDESHOW_SOURCE_INC_EXPRESSIONNODE_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/slideshow/source/inc/hyperlinkarea.hxx b/slideshow/source/inc/hyperlinkarea.hxx
index d7d760c081f7..7ee124d43649 100644
--- a/slideshow/source/inc/hyperlinkarea.hxx
+++ b/slideshow/source/inc/hyperlinkarea.hxx
@@ -17,8 +17,7 @@
  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  */
 
-#ifndef INCLUDED_SLIDESHOW_SOURCE_INC_HYPERLINKAREA_HXX
-#define INCLUDED_SLIDESHOW_SOURCE_INC_HYPERLINKAREA_HXX
+#pragma once
 
 #include <rtl/ustring.hxx>
 
@@ -93,6 +92,4 @@ namespace slideshow::internal
 
 }
 
-#endif // INCLUDED_SLIDESHOW_SOURCE_INC_HYPERLINKAREA_HXX
-
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */