diff --git a/bin/generate-gutenberg-php.php b/bin/generate-gutenberg-php.php
index 4ed6b661a21c23..1dc2cf6db4ef59 100755
--- a/bin/generate-gutenberg-php.php
+++ b/bin/generate-gutenberg-php.php
@@ -15,6 +15,8 @@
 /**
  * Prints `define` statements for the production version of `gutenberg.php`
  * (the plugin entry point).
+ *
+ * @global string $plugin_version The version number of the plugin.
  */
 function print_production_defines() {
 	global $plugin_version;
diff --git a/lib/demo.php b/lib/demo.php
index 11272050bf4c2e..0e7ad5c2c8cc78 100644
--- a/lib/demo.php
+++ b/lib/demo.php
@@ -11,6 +11,8 @@
 
 /**
  * Redirects the demo page to edit a new post.
+ *
+ * @global string $pagenow The name of the current admin page being viewed.
  */
 function gutenberg_redirect_demo() {
 	global $pagenow;