diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6e92f57
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+tags
diff --git a/filters.inc.php b/filters.inc.php
index b83739c..7227f93 100644
--- a/filters.inc.php
+++ b/filters.inc.php
@@ -63,9 +63,9 @@ function flt_time($val, $name, $struct, $args)
     if(!preg_match($reg, $val, $matches))
       throw new Exception("Bad value, pattern 00:00:00");
 
-    $h = $matches[1];
-    $m = $matches[2];
-    $s = $matches[3];
+    $h = intval($matches[1]);
+    $m = intval($matches[2]);
+    $s = intval($matches[3]);
     
     return $h * 3600 + $m * 60 + $s;
   }