diff --git a/vcl/inc/pdf/pdfwriter_impl.hxx b/vcl/inc/pdf/pdfwriter_impl.hxx
index 3f09038068b8..4b7b72dce4fc 100644
--- a/vcl/inc/pdf/pdfwriter_impl.hxx
+++ b/vcl/inc/pdf/pdfwriter_impl.hxx
@@ -34,7 +34,6 @@
 #include <pdf/ResourceDict.hxx>
 #include <pdf/BitmapID.hxx>
 #include <pdf/Matrix3.hxx>
-#include <pdf/PDFEncryptor.hxx>
 
 #include <com/sun/star/lang/Locale.hpp>
 #include <com/sun/star/util/XURLTransformer.hpp>
@@ -684,6 +683,8 @@ struct PDFDocumentAttachedFile
     sal_Int32 mnObjectId;
 };
 
+class IPDFEncryptor;
+
 } // end pdf namespace
 
 class PDFWriterImpl final : public VirtualDevice, public PDFObjectContainer
diff --git a/vcl/source/gdi/pdfwriter_impl.cxx b/vcl/source/gdi/pdfwriter_impl.cxx
index 0570e49b6a16..91eb3a1e078c 100644
--- a/vcl/source/gdi/pdfwriter_impl.cxx
+++ b/vcl/source/gdi/pdfwriter_impl.cxx
@@ -96,6 +96,8 @@
 #include <pdf/objectcopier.hxx>
 #include <pdf/pdfwriter_impl.hxx>
 #include <pdf/PdfConfig.hxx>
+#include <pdf/IPDFEncryptor.hxx>
+#include <pdf/PDFEncryptor.hxx>
 #include <o3tl/sorted_vector.hxx>
 #include <frozen/bits/defines.h>
 #include <frozen/bits/elsa_std.h>
diff --git a/vcl/source/gdi/pdfwriter_impl2.cxx b/vcl/source/gdi/pdfwriter_impl2.cxx
index ec4adefa47c7..2f06a292c936 100644
--- a/vcl/source/gdi/pdfwriter_impl2.cxx
+++ b/vcl/source/gdi/pdfwriter_impl2.cxx
@@ -25,6 +25,7 @@
 #include <vcl/metaact.hxx>
 #include <vcl/BitmapReadAccess.hxx>
 #include <vcl/graph.hxx>
+#include <pdf/IPDFEncryptor.hxx>
 
 #include <unotools/streamwrap.hxx>