diff --git a/templates/plugin.mustache b/templates/plugin.mustache
index 1f6190bd..097fc41e 100644
--- a/templates/plugin.mustache
+++ b/templates/plugin.mustache
@@ -13,3 +13,6 @@
  */
 
 // Your code starts here.
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}