diff --git a/js/main.js b/js/main.js
index d619d19..944c200 100644
--- a/js/main.js
+++ b/js/main.js
@@ -159,7 +159,7 @@ function handleDelete(event) {
 
 function handleEnter(event) {
 	let pos = editor.getCursor();
-	if (pos.line < editor.doc.size) {
+	if (pos.line < editor.doc.size - 1) {
 		let currentLine = editor.doc.getLine(pos.line);
 		let trimmed = currentLine.trim();
 		if (editor.getCursor().ch >= currentLine.indexOf(trimmed) + trimmed.length) {