diff --git a/src/Smalot/PdfParser/RawData/RawDataParser.php b/src/Smalot/PdfParser/RawData/RawDataParser.php
index a94be8a7..a3f9761c 100644
--- a/src/Smalot/PdfParser/RawData/RawDataParser.php
+++ b/src/Smalot/PdfParser/RawData/RawDataParser.php
@@ -883,7 +883,7 @@ protected function getXrefData(string $pdfData, int $offset = 0, array $xref = [
 
         // Find all startxref tables from this $offset forward
         $startxrefPreg = preg_match_all(
-            '/(?<=[\r\n])startxref[\s]*[\r\n]+([0-9]+)[\s]*[\r\n]+%%EOF/i',
+            '/(?<=[\r\n])startxref(?:[\s]*[\r\n]+[\s]*|\s+)([0-9]+)[\s]*[\r\n]+%%EOF/i',
             $pdfData,
             $startxrefMatches,
             \PREG_SET_ORDER,