diff --git a/fileformats/core/hook.py b/fileformats/core/hook.py
index 1bf529a..633f366 100644
--- a/fileformats/core/hook.py
+++ b/fileformats/core/hook.py
@@ -213,4 +213,4 @@ def type_match(a, b) -> bool:
                 f"decorated method {method} and the registered override {function}:\n"
                 + "\n".join(differences)
             )
-        self.dispatch.register(function)
+        return self.dispatch.register(function)