diff --git a/src/ol/control/ScaleLine.js b/src/ol/control/ScaleLine.js
index 79fc6afccc..d97f29d33e 100644
--- a/src/ol/control/ScaleLine.js
+++ b/src/ol/control/ScaleLine.js
@@ -484,12 +484,12 @@ class ScaleLine extends Control {
     const resolution = getPointResolution(
       this.viewState_.projection,
       this.viewState_.resolution,
-      this.viewState_.center
+      this.viewState_.center,
+      ProjUnits.METERS
     );
     const dpi = this.dpi_ || DEFAULT_DPI;
-    const mpu = this.viewState_.projection.getMetersPerUnit();
     const inchesPerMeter = 1000 / 25.4;
-    return parseFloat(resolution.toString()) * mpu * inchesPerMeter * dpi;
+    return parseFloat(resolution.toString()) * inchesPerMeter * dpi;
   }
 
   /**