diff --git a/core/prelude-packages.el b/core/prelude-packages.el
index ced3895..6643ae0 100644
--- a/core/prelude-packages.el
+++ b/core/prelude-packages.el
@@ -127,6 +127,8 @@ PACKAGE is installed only if not already present.  The file is opened in MODE."
 
 (defvar prelude-auto-install-alist
   '(("\\.clj\\'" clojure-mode clojure-mode)
+    ("\\.cmake\\'" cmake-mode cmake-mode)
+    ("CMakeLists\\.txt\\'" cmake-mode cmake-mode)
     ("\\.coffee\\'" coffee-mode coffee-mode)
     ("\\.css\\'" css-mode css-mode)
     ("\\.csv\\'" csv-mode csv-mode)