diff --git a/docs/appendix.md b/docs/appendix.md
index 81045b2e932..30ec68b88ef 100644
--- a/docs/appendix.md
+++ b/docs/appendix.md
@@ -25,7 +25,7 @@ You may use the following table as a reference for which types are supported and
 | <code>Promise&lt;T&gt;</code>                                              | <code>Promise&lt;T&gt;</code>                       | <code>?Promise&lt;T&gt;</code>                          | <code>Promise&lt;T&gt; &#124; null</code>            | `com.facebook.react.bridge.Promise`  | `RCTPromiseResolve` and `RCTPromiseRejectBlock`                |
 | Type Unions<br /><code>'SUCCESS'&#124;'FAIL'</code>                        | Type Unions<br /><code>'SUCCESS'&#124;'FAIL'</code> | Only as callbacks                                       |                                                      | \-                                   | \-                                                             |
 | Callbacks<br />`() =>`                                                     | Callbacks<br />`() =>`                              | Yes                                                     |                                                      | `com.facebook.react.bridge.Callback` | `RCTResponseSenderBlock`                                       |
-| `number`                                                                   | `number`                                            | No                                                      |                                                      | `double`                             | `NSNumber`                                                     |
+| `number`                                                                   | `number`                                            | No                                                      |                                                      | `double`                             | `double`                                                     |
 
 ### Notes: