diff --git a/fish/functions/set_brightness.fish b/fish/functions/set_brightness.fish
new file mode 100644
index 0000000..5a3f598
--- /dev/null
+++ b/fish/functions/set_brightness.fish
@@ -0,0 +1,3 @@
+function set_brightness --argument-names amount
+  echo $amount | sudo tee /sys/class/backlight/*/brightness > /dev/null
+end