diff --git a/ext/phar/phar.c b/ext/phar/phar.c
index 0e3ba8a8d25..e7a61f277e9 100644
--- a/ext/phar/phar.c
+++ b/ext/phar/phar.c
@@ -2481,7 +2481,7 @@ static int phar_flush_clean_deleted_apply(zval *zv) /* {{{ */
 }
 /* }}} */
 
-#include "stub.h"
+#include "stub.h" /* Generated phar_get_stub() function from makestub.php script */
 
 zend_string *phar_create_default_stub(const char *index_php, const char *web_index, char **error) /* {{{ */
 {