diff --git a/lib/helpers.php b/lib/helpers.php
index f483fcb..5365a7d 100644
--- a/lib/helpers.php
+++ b/lib/helpers.php
@@ -116,7 +116,11 @@ function summary($value, $min_length = 5, $max_length = 120, $end = '[...]')
     $length = strlen($value);
 
     if ($length > $max_length) {
-        return substr($value, 0, strpos($value, ' ', $max_length)).' '.$end;
+        $max = strpos($value, ' ', $max_length);
+        if ($max === false) {
+            $max = $max_length;
+        }
+        return substr($value, 0, $max).' '.$end;
     }
     else if ($length < $min_length) {
         return '';