diff --git a/91-drm-modeset.rules b/91-drm-modeset.rules
index 789c9f4..650acc3 100644
--- a/91-drm-modeset.rules
+++ b/91-drm-modeset.rules
@@ -1 +1 @@
-KERNEL=="controlD[0-9]*",	NAME="dri/%k", MODE="0666"
+KERNEL=="controlD[0-9]*",	NAME="dri/%k", MODE="0600"