diff --git a/lib/rules/jsx-no-leaked-render.js b/lib/rules/jsx-no-leaked-render.js
index 32d537814b..05f319edbf 100644
--- a/lib/rules/jsx-no-leaked-render.js
+++ b/lib/rules/jsx-no-leaked-render.js
@@ -86,8 +86,8 @@ function ruleFixer(context, fixStrategy, fixer, reportedNode, leftNode, rightNod
       const rightSideTextLines = rightSideText.split('\n');
       if (rightSideTextLines.length > 1) {
         const rightSideTextLastLine = rightSideTextLines[rightSideTextLines.length - 1];
-        const indentSpacesStart = Array(rightSideTextLastLine.search(/\S/)).fill(' ').join('');
-        const indentSpacesClose = Array(rightSideTextLastLine.search(/\S/) - 2).fill(' ').join('');
+        const indentSpacesStart = ' '.repeat(rightSideTextLastLine.search(/\S/));
+        const indentSpacesClose = ' '.repeat(rightSideTextLastLine.search(/\S/) - 2);
         return fixer.replaceText(reportedNode, `${newText} && (\n${indentSpacesStart}${rightSideText}\n${indentSpacesClose})`);
       }
     }