Index: src/include/exif.php
===================================================================
--- src/include/exif.php	(revision 1912)
+++ src/include/exif.php	(working copy)
@@ -102,7 +102,7 @@
   $row = pg_fetch_row(pg_query($database, "
      select identifier 
        from film_iso
-      where value = $iso"));
+      where value = '$iso'"));
 
   if ($row === FALSE)
     return "null";