diff --git a/README.md b/README.md
index cc08775..8029677 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,9 @@ julia> fieldnames(mystruct)
 
 julia> mystruct(1, 2, [])
 mystruct(1.0, 2, Any[])
+
+julia> mystruct <: abs_type
+true
 ```
 
 ### Default values
@@ -54,4 +57,4 @@ julia> abstract type supertype end
 julia> @with_fields abs_type <: supertype a_def b_def
 julia> abs_type <: supertype
 true
-```
\ No newline at end of file
+```