diff --git a/src/include/common.php b/src/include/common.php
index a638a7e..44e576b 100644
--- a/src/include/common.php
+++ b/src/include/common.php
@@ -145,7 +145,9 @@ function get_path_to($database, $type, $id, $html = TRUE) {
 
   for ($i = 0 ; $i < pg_num_rows($data); $i++) {
     $row = pg_fetch_assoc($data);
-    $row['caption'] = strip_tags($row['caption']);
+    if ($row['caption'] !== NULL) {
+        $row['caption'] = strip_tags($row['caption']);
+    }
     $row['caption'] = makeZanza($row['caption'], $strings['photo_no_title']);
     if ($html) {
       $stack[] = emit_a(generate_link($type, $row['identifier']), $row['caption']);