diff --git a/themes/engines/phptemplate/block.tpl.php b/themes/engines/phptemplate/block.tpl.php
index 3df046fcaabd2b637696084cfb299fa0a647b947..8ba204d40ea58f5792410e73272b68eb33bf7a1b 100644
--- a/themes/engines/phptemplate/block.tpl.php
+++ b/themes/engines/phptemplate/block.tpl.php
@@ -1,4 +1,4 @@
-<div id="block-<?php print $block->module-$block->delta; ?>" class="block block-<?php print $block->module ?>">
+<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="block block-<?php print $block->module ?>">
 
 <?php if ($block->subject): ?>
   <h2><?php print $block->subject ?></h2>