diff --git a/src/lib.rs b/src/lib.rs
index 4557ee8..51ed4f6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -77,6 +77,6 @@ where
 
   /// Sends `readyok` to the GUI
   pub fn ready(&mut self) {
-    write!(&mut self.writer, "{}", commands::ReADYOK).expect("failed to send `readyok` command");
+    write!(&mut self.writer, "{}", commands::READYOK).expect("failed to send `readyok` command");
   }
 }