diff --git a/Sources/sourcekit-lsp/SourceKitLSP.swift b/Sources/sourcekit-lsp/SourceKitLSP.swift
index 22531d171..d0f317355 100644
--- a/Sources/sourcekit-lsp/SourceKitLSP.swift
+++ b/Sources/sourcekit-lsp/SourceKitLSP.swift
@@ -224,6 +224,7 @@ struct SourceKitLSP: AsyncParsableCommand {
     serverOptions.indexOptions.indexPrefixMappings = indexPrefixMappings
     serverOptions.completionOptions.maxResults = completionMaxResults
     serverOptions.generatedInterfacesPath = generatedInterfacesPath
+    serverOptions.experimentalFeatures = experimentalFeatures
 
     return serverOptions
   }