diff --git a/TODO.txt b/TODO.txt
index 56d2ade..32fd557 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -22,7 +22,7 @@ Milestone: v0.4.0
         [x] Rename Sha2.h to just Sha; add Sha1() function
         [x] Make Sha256() return raw bytes; add function to
             convert to hex string.
-    [ ] 8: Rooms
+    [~] 8: Rooms
     [~] 9: User Data
         [x] Profiles
         [~] Directory
diff --git a/src/include/Event.h b/src/include/Event.h
index 5246b17..452ecbc 100644
--- a/src/include/Event.h
+++ b/src/include/Event.h
@@ -52,4 +52,10 @@ extern char * EventContentHash(HashMap *);
  */
 extern char * EventIdGet(Room *, HashMap *);
 
+/**
+ * Redact an event according to the rules for the given
+ * room. The event is modified in place.
+ */
+extern int EventRedact(Room *, HashMap *);
+
 #endif /* TELODENDRIA_EVENT_H */