diff --git a/codetab.ts b/codetab.ts
index 48650d3..d9556ac 100644
--- a/codetab.ts
+++ b/codetab.ts
@@ -230,7 +230,7 @@ const gridToIndex = (str: string, x: number, y: number) => {
 	if (y >= lines.length) {
 		return str.length;
 	}
-	return lines.slice(0, y).join("\n").length+Math.min(x, lines[y].length)+1;
+	return lines.slice(0, y).join("\n").length+Math.min(x, lines[y].length)+(y === 0 ? 0 : 1);
 }
 
 const keywords = [