diff --git a/README.md b/README.md
index 5744ba1..68a24ad 100644
--- a/README.md
+++ b/README.md
@@ -225,7 +225,7 @@ var simplemde = new SimpleMDE({
 		},
 		{
 			name: "custom",
-			action: customFunction(editor){
+			action: function customFunction(editor){
 				// Add your own code
 			},
 			className: "fa fa-star",