diff --git a/src/tools/rust-analyzer/editors/code/src/config.ts b/src/tools/rust-analyzer/editors/code/src/config.ts
index 2ae329134520..896b3c10cbf5 100644
--- a/src/tools/rust-analyzer/editors/code/src/config.ts
+++ b/src/tools/rust-analyzer/editors/code/src/config.ts
@@ -27,6 +27,7 @@ export class Config {
         "server",
         "files",
         "cfg",
+        "showSyntaxTree",
     ].map((opt) => `${this.rootSection}.${opt}`);
 
     private readonly requiresWindowReloadOpts = ["testExplorer"].map(