diff --git a/lsp-mode.md b/lsp-mode.md
index e0a5b9c..2ac3619 100644
--- a/lsp-mode.md
+++ b/lsp-mode.md
@@ -60,6 +60,10 @@ If your project has subprojects, `(projectile-project-root)` may think files in
 
 Read `lsp-project-whitelist lsp-project-blacklist` if you don't want to start ccls for some paths.
 
+
+#### flycheck
+If you are flycheck user, make sure `  (setq-default flycheck-disabled-checkers '(c/c++-clang c/c++-cppcheck c/c++-gcc))`, otherwise wrong error messages may occur.
+
 ### Diagnostics
 
 * `(lsp--client-capabilities)` LSP workspace is initialized correctly