diff --git a/46.md b/46.md
index 8647e940..372091af 100644
--- a/46.md
+++ b/46.md
@@ -67,8 +67,8 @@ These are mandatory methods the remote signer app MUST implement:
   - result `pubkey` 
 - **sign_event**
   - params [`event`, `options`]
-  - options
-    - `pow` minimum proof-of-work difficulty
+    - `options` (object, optional)
+      - `pow` target proof-of-work difficulty for the signed event
   - result `event_with_signature` 
 
 #### optional