diff --git a/crates/rust-analyzer/src/bin/args.rs b/crates/rust-analyzer/src/bin/args.rs
index 2a532361dc9..3a7db6a18ae 100644
--- a/crates/rust-analyzer/src/bin/args.rs
+++ b/crates/rust-analyzer/src/bin/args.rs
@@ -50,6 +50,8 @@ FLAGS:
     -vv, --spammy
     -q,  --quiet      Set verbosity
 
+    --print-config-schema
+                      Dump a LSP config JSON schema
     --log-file <PATH> Log to the specified file instead of stderr
     --no-log-buffering
                       Flush log records to the file immediately