diff --git a/README.md b/README.md
index 3976fe0..59b182d 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ Function takes a callback function, passed to which is a boolean property. Optio
  */
 window.plugin.printer.isServiceAvailable(
     function (isAvailable) {
-        alert(isavailable ? 'Service is available' : 'Service NOT available');
+        alert(isAvailable ? 'Service is available' : 'Service NOT available');
     }
 );
 ```