diff --git a/.emacs b/.emacs
index d1e91e5..ab7a94e 100644
--- a/.emacs
+++ b/.emacs
@@ -125,7 +125,8 @@
 (use-package php-mode)
 (use-package pkgbuild-mode)
 (use-package qml-mode)
-(use-package scad-mode)
+(use-package scad-mode
+  :mode "\\.scad$")
 (use-package smarttabs
   :config
   (smart-tabs-insinuate 'c 'c++ 'javascript))