diff --git a/Sources/SourceKitLSP/SourceKitLSPServer.swift b/Sources/SourceKitLSP/SourceKitLSPServer.swift
index 3c8148bb6..5e325dd36 100644
--- a/Sources/SourceKitLSP/SourceKitLSPServer.swift
+++ b/Sources/SourceKitLSP/SourceKitLSPServer.swift
@@ -1104,6 +1104,7 @@ extension SourceKitLSPServer {
       experimental: .dictionary([
         "workspace/tests": .dictionary(["version": .int(2)]),
         "textDocument/tests": .dictionary(["version": .int(2)]),
+        "workspace/triggerReindex": .dictionary(["version": .int(1)]),
       ])
     )
   }