diff --git a/core/core-ui.el b/core/core-ui.el
index 188dba4f7..07ee35a2c 100644
--- a/core/core-ui.el
+++ b/core/core-ui.el
@@ -134,7 +134,7 @@
 (use-package rainbow-delimiters
   :commands rainbow-delimiters-mode
   :init
-  (add-hook! (emacs-lisp-mode lisp-mode js2-mode scss-mode)
+  (add-hook! (emacs-lisp-mode lisp-mode js2-mode scss-mode c-mode-common)
     'rainbow-delimiters-mode)
   :config
   (setq rainbow-delimiters-max-face-count 4))