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diff --git a/README.md b/README.md
index b7b5683..6bb5f91 100644
--- a/README.md
+++ b/README.md
@@ -209,6 +209,7 @@ Zig Core Language
 * [X] Interfaces
 * [X] Bit manipulation
 * [X] Working with C
+* [ ] Interfaces part 2
 
 Zig Standard Library