diff --git a/lpdf.php b/lpdf.php
index b6e31b0..5c8745c 100644
--- a/lpdf.php
+++ b/lpdf.php
@@ -306,7 +306,11 @@ class lpdf
 	function output()
 	{
 		pdf_end_page($this->pdf);
-		pdf_close_image($this->pdf,$this->logoimage);
+
+		//only close the image if it was opened to begin with
+		if($this->logoimage)
+			pdf_close_image($this->pdf,$this->logoimage);
+
 		pdf_close($this->pdf);
 		$pdfdata=pdf_get_buffer($this->pdf);
 		header("Content-type: application/pdf");