diff --git a/init.el b/init.el
index 3d88f5d..f7d1639 100644
--- a/init.el
+++ b/init.el
@@ -252,8 +252,9 @@ With argument, do this that many times."
       (flycheck-clang-tidy-setup)
       ;; Run clang-tidy after the lsp-ui checker.
       (when lsp-mode
-        (flycheck-add-next-checker 'lsp-ui '(warning . c/c++-clang-tidy)))
-      )
+        (unless (equal (flycheck-get-next-checker-for-buffer 'lsp-ui)
+                       'c/c++-clang-tidy)
+          (flycheck-add-next-checker 'lsp-ui '(warning . c/c++-clang-tidy)))))
     :hook
     (flycheck-mode . my/flycheck-clang-tidy-setup)
     (first-change . my/clang-tidy-off)  ; Disable when file is modified.