diff --git a/README.md b/README.md
index 41ff968..6ef17f7 100644
--- a/README.md
+++ b/README.md
@@ -129,6 +129,8 @@ The include tag allows you to import content from other templates in the namespa
 #include("header.html")
 ```
 
+If the file name starts with a question mark, nonexistent files will be ignored.
+
 #### Using the `include` tag with extra arguments
 
 The `include` tag can accept extra local variables as arguments. Here's an example with a `title` variable:
@@ -153,6 +155,8 @@ The macro tag is a powerful feature that allows you to define reusable template
 
 When a macro tag has a block, it sets the macro's content. When it doesn't, it inserts the contents of the macro. In the above example, a macro is defined and then inserted.
 
+If the macro name starts with a question mark, nonexistent macros will be ignored.
+
 #### Using the `macro` tag with extra arguments
 
 Similar to the `include` tag, the `macro` tag can accept extra local variables as arguments. You can define these variables when including the macro. Here's an example: