diff --git a/Sources/SourceKitLSP/SourceKitLSPServer.swift b/Sources/SourceKitLSP/SourceKitLSPServer.swift
index c6c75d82f..ad5d24f78 100644
--- a/Sources/SourceKitLSP/SourceKitLSPServer.swift
+++ b/Sources/SourceKitLSP/SourceKitLSPServer.swift
@@ -1120,6 +1120,7 @@ extension SourceKitLSPServer {
       experimental: .dictionary([
         "workspace/tests": .dictionary(["version": .int(2)]),
         "textDocument/tests": .dictionary(["version": .int(2)]),
+        "workspace/triggerReindex": .dictionary(["version": .int(1)]),
       ])
     )
   }