diff --git a/src/components/layers/JSONEditor.jsx b/src/components/layers/JSONEditor.jsx
index e721ab30..f1a5faeb 100644
--- a/src/components/layers/JSONEditor.jsx
+++ b/src/components/layers/JSONEditor.jsx
@@ -161,7 +161,7 @@ class JSONEditor extends React.Component {
     }
 
     return <div className="JSONEditor" onPointerDown={this.onPointerDown} aria-hidden="true">
-      <div class={classnames("JSONEditor__message", {"JSONEditor__message--on": showMessage})}>
+      <div className={classnames("JSONEditor__message", {"JSONEditor__message--on": showMessage})}>
         Press <kbd>ESC</kbd> to lose focus
       </div>
       <div