diff --git a/Interfaces.md b/Interfaces.md
index 8246e6d..06e94d8 100644
--- a/Interfaces.md
+++ b/Interfaces.md
@@ -5,11 +5,13 @@ interface.
 They are defined like this:
 
 ```
-face ro ReadWriter
+face ro ReadWriter:Face
 	read
 		> into:{Byte ..}
 		< amountRead:Size
 	write
 		> buffer{Byte ..}
 		< amountWrote:Size
-```
\ No newline at end of file
+```
+
+Interfaces are able to inherit other interfaces using type notation. If an interface inherits nothing, it must inherit `Face`, which is a blank interface.
\ No newline at end of file