diff --git a/CHANGES b/CHANGES
index f88833b..3705b3e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -53,7 +53,7 @@ v2.38 (Unreleased)
  [fix]  PHP 8.1-related warnings
  [fix]  Updated bug URLs.
  [fix]  Deal with malformed feed requests
- [fix]  Use TIFF files when submitting print jobs
+ [fix]  Use PNG files when submitting print jobs
 
 v2.37.1 (December 3, 2012)
 
diff --git a/src/include/print.printer.php b/src/include/print.printer.php
index 1fbaa5d..c27efa7 100644
--- a/src/include/print.printer.php
+++ b/src/include/print.printer.php
@@ -127,7 +127,7 @@ function photo_print_single($database, $single) {
     # generate sane filename
     $tmp_filename = tempnam($tmp_volume_path, "po.print.");
     unlink($tmp_filename);
-    $tmp_filename .= ".tiff";
+    $tmp_filename .= ".png";
 
     # set up processing
     if ($use_gm) {