diff --git a/README.md b/README.md
index 6d12709..e3f480d 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ A supported EVGA 30-series card with iCX3.  This includes:
 
 The number of fans supported depends, of course, on your particular model.
 
+You must have the `i2c-dev` kernel module loaded with `modprobe i2c-dev`
+
 Access to the `/dev/i2c` device files, which means either:
 * Run as root, or
 * Install udev rules to allow user access. If you have the OpenRGB udev rules installed to control the LEDs you already have this set up.