diff --git a/packages/codemirror/src/editor.ts b/packages/codemirror/src/editor.ts
index b6a0716e04e2..05e8d7626432 100644
--- a/packages/codemirror/src/editor.ts
+++ b/packages/codemirror/src/editor.ts
@@ -1438,7 +1438,7 @@ namespace Private {
           value === 'bounded' ? `${config.wordWrapColumn}ch` : null;
         const width =
           value === 'wordWrapColumn' ? `${config.wordWrapColumn}ch` : null;
-        lines.style.setProperty('maxWidth', maxWidth);
+        lines.style.setProperty('max-width', maxWidth);
         lines.style.setProperty('width', width);
         editor.setOption('lineWrapping', lineWrapping);
         break;