diff --git a/src/plugins/coco/cocolanguageclient.cpp b/src/plugins/coco/cocolanguageclient.cpp
index 89c75d77d6d..242941e774e 100644
--- a/src/plugins/coco/cocolanguageclient.cpp
+++ b/src/plugins/coco/cocolanguageclient.cpp
@@ -74,7 +74,7 @@ BaseClientInterface *CocoLanguageClient::clientInterface(const FilePath &coco,
                                                          const FilePath &csmes)
 {
     auto interface = new StdIOClientInterface();
-    interface->setCommandLine(CommandLine(coco, {"--lsp-stdio", "--debug", csmes.toUserOutput()}));
+    interface->setCommandLine(CommandLine(coco, {"--lsp-stdio", csmes.toUserOutput()}));
     return interface;
 }