diff --git a/speaker-driver.lua b/speaker-driver.lua
index e8c9000..e832f60 100644
--- a/speaker-driver.lua
+++ b/speaker-driver.lua
@@ -8,7 +8,7 @@ local sounds = {
 
 local function initialize()
     kernel = require("kernel")
-    kernel.addSound('notification')
+    kernel.addSound("notification")
     speaker = peripheral.find("speaker")
     if not speaker then
         print("Warning: No speaker attached.")