diff --git a/SeedDMS_Preview/Preview/PdfPreviewer.php b/SeedDMS_Preview/Preview/PdfPreviewer.php
index d4cc0b477..6ce557810 100644
--- a/SeedDMS_Preview/Preview/PdfPreviewer.php
+++ b/SeedDMS_Preview/Preview/PdfPreviewer.php
@@ -96,7 +96,7 @@ class SeedDMS_Preview_PdfPreviewer extends SeedDMS_Preview_Base {
 			return false;
 		if(!$target)
 			$target = $this->previewDir.$dir.md5($infile);
-		$this->lastpreviewfile = $target.'.png';
+		$this->lastpreviewfile = $target.'.pdf';
 		if($target != '' && (!file_exists($target.'.pdf') || filectime($target.'.pdf') < filectime($infile))) {
 			$cmd = '';
 			$mimeparts = explode('/', $mimetype, 2);