diff --git a/lib/pen.js b/lib/pen.js
index 4bfed02..47f8c1f 100644
--- a/lib/pen.js
+++ b/lib/pen.js
@@ -547,7 +547,7 @@ export default class Painter {
       }
       let lineIndex = 0;
       for (let j = 0; j < textArray.length; ++j) {
-        const preLineLength = Math.floor(textArray[j].length / linesArray[j]);
+        const preLineLength = Math.ceil(textArray[j].length / linesArray[j]);
         let start = 0;
         let alreadyCount = 0;
         for (let i = 0; i < linesArray[j]; ++i) {