Clarify initializationOptions

1 files changed, 5 insertions, 3 deletions

diff --git a/docs/dev/lsp-extensions.md b/docs/dev/lsp-extensions.md
index 6d6bbac7c..98d14450b 100644
--- a/docs/dev/lsp-extensions.md
+++ b/docs/dev/lsp-extensions.md
@@ -11,11 +11,13 @@ If you want to be notified about the changes to this document, subscribe to [#46
 
 ## `initializationOptions`
 
-As `initializationOptions`, `rust-analyzer` expects `"rust-analyzer"` section of the configuration.
+For `initializationOptions`, `rust-analyzer` expects `"rust-analyzer"` section of the configuration.
 That is, `rust-analyzer` usually sends `"workspace/configuration"` request with `{ "items": ["rust-analyzer"] }` payload.
 `initializationOptions` should contain the same data that would be in the first item of the result.
-It's OK to not send anything, then all the settings would take their default values.
-However, some settings can not be changed after startup at the moment.
+If a language client does not know about `rust-analyzer`'s configuration options it can get sensible defaults by doing any of the following:
+ * Not sending `initializationOptions`
+ * Send `"initializationOptions": null`
+ * Send `"initializationOptions": {}`
 
 ## Snippet `TextEdit`