diff --git a/bug_update.php b/bug_update.php
index fc0264147b..6311da061c 100644
--- a/bug_update.php
+++ b/bug_update.php
@@ -91,7 +91,7 @@
 $t_updated_bug->eta = gpc_get_int( 'eta', $t_existing_bug->eta );
 $t_updated_bug->fixed_in_version = gpc_get_string( 'fixed_in_version', $t_existing_bug->fixed_in_version );
 $t_updated_bug->handler_id = gpc_get_int( 'handler_id', $t_existing_bug->handler_id );
-$t_updated_bug->last_updated = gpc_get_int( 'last_updated' );
+$t_updated_bug->last_updated = gpc_get_string( 'last_updated' );
 $t_updated_bug->os = gpc_get_string( 'os', $t_existing_bug->os );
 $t_updated_bug->os_build = gpc_get_string( 'os_build', $t_existing_bug->os_build );
 $t_updated_bug->platform = gpc_get_string( 'platform', $t_existing_bug->platform );