diff --git a/src/ol/control/ScaleLine.js b/src/ol/control/ScaleLine.js
index 852ec120c7..f496316ff6 100644
--- a/src/ol/control/ScaleLine.js
+++ b/src/ol/control/ScaleLine.js
@@ -390,7 +390,7 @@ class ScaleLine extends Control {
           '<div ' +
           'class="ol-scale-singlebar ' +
           backgroundColor +
-          '"' +
+          '" ' +
           'style=' +
           '"width: ' +
           stepWidth +