diff --git a/src/PhpSpreadsheet/Writer/Pdf.php b/src/PhpSpreadsheet/Writer/Pdf.php
index 52f95749..f0c1798f 100644
--- a/src/PhpSpreadsheet/Writer/Pdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf.php
@@ -267,10 +267,8 @@ abstract class Pdf extends Html
 
     /**
      * Save PhpSpreadsheet to PDF file, post-save.
-     *
-     * @param resource $fileHandle
      */
-    protected function restoreStateAfterSave($fileHandle)
+    protected function restoreStateAfterSave(): void
     {
         $this->maybeCloseFileHandle();
 
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php b/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
index 3c3044d7..783bf253 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Dompdf.php
@@ -73,6 +73,6 @@ class Dompdf extends Pdf
         //  Write to file
         fwrite($fileHandle, $pdf->output());
 
-        parent::restoreStateAfterSave($fileHandle);
+        parent::restoreStateAfterSave();
     }
 }
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php b/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php
index 5fdc4ea8..2922db15 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Mpdf.php
@@ -95,7 +95,7 @@ class Mpdf extends Pdf
         //  Write to file
         fwrite($fileHandle, $pdf->Output('', 'S'));
 
-        parent::restoreStateAfterSave($fileHandle);
+        parent::restoreStateAfterSave();
     }
 
     /**
diff --git a/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php b/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
index 8a97b8fe..6ba77c75 100644
--- a/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
+++ b/src/PhpSpreadsheet/Writer/Pdf/Tcpdf.php
@@ -93,6 +93,6 @@ class Tcpdf extends Pdf
         //  Write to file
         fwrite($fileHandle, $pdf->output($pFilename, 'S'));
 
-        parent::restoreStateAfterSave($fileHandle);
+        parent::restoreStateAfterSave();
     }
 }