diff --git a/src/directives.php b/src/directives.php
index 41b1f6a..6a37cc1 100644
--- a/src/directives.php
+++ b/src/directives.php
@@ -234,7 +234,7 @@
     'pushonce' => function ($expression) {
         list($pushName, $pushSub) = explode(':', trim(substr($expression, 1, -1)));
 
-        $key = '__pushonce_'.$pushName.'_'.$pushSub;
+        $key = '__pushonce_'.$pushName.'_'.str_replace('-', '_', $pushSub);
 
         return "<?php if(! isset(\$__env->{$key})): \$__env->{$key} = 1; \$__env->startPush('{$pushName}'); ?>";
     },