diff --git a/progress.md b/progress.md
index 99b29bc..a0808bd 100644
--- a/progress.md
+++ b/progress.md
@@ -101,7 +101,7 @@
  - [ ] 11.4 Benchmark Functions
  - [x] 11.5 Profiling
  - [x] 11.6 Example Functions
-- [ ] Chapter 12: Reflection
+- [x] Chapter 12: Reflection
  - [ ] 12.1 Why Reflection?
  - [ ] 12.2 reflect.Type and reflect.Value
  - [ ] 12.3 Display, a Recursive Value Printer