diff --git a/src/ol/proj.js b/src/ol/proj.js
index d16bc58480..7ffce664ea 100644
--- a/src/ol/proj.js
+++ b/src/ol/proj.js
@@ -7,7 +7,7 @@ import {modulo} from './math.js';
 import {toEPSG4326, fromEPSG4326, PROJECTIONS as EPSG3857_PROJECTIONS} from './proj/epsg3857.js';
 import {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';
 import Projection from './proj/Projection.js';
-import Units from './proj/Units.js';
+import Units, {METERS_PER_UNIT} from './proj/Units.js';
 import * as projections from './proj/projections.js';
 import {add as addTransformFunc, clear as clearTransformFuncs, get as getTransformFunc} from './proj/transforms.js';
 
@@ -18,7 +18,7 @@ import {add as addTransformFunc, clear as clearTransformFuncs, get as getTransfo
  * @type {Object.<ol.proj.Units, number>}
  * @api
  */
-export const METERS_PER_UNIT = Units.METERS_PER_UNIT;
+export {METERS_PER_UNIT};
 
 
 /**
@@ -147,7 +147,7 @@ export function getPointResolution(projection, resolution, point, opt_units) {
       const height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));
       pointResolution = (width + height) / 2;
       const metersPerUnit = opt_units ?
-        Units.METERS_PER_UNIT[opt_units] :
+        METERS_PER_UNIT[opt_units] :
         projection.getMetersPerUnit();
       if (metersPerUnit !== undefined) {
         pointResolution /= metersPerUnit;
diff --git a/src/ol/proj/Projection.js b/src/ol/proj/Projection.js
index f1184a124c..80008d2cc5 100644
--- a/src/ol/proj/Projection.js
+++ b/src/ol/proj/Projection.js
@@ -1,7 +1,7 @@
 /**
  * @module ol/proj/Projection
  */
-import Units from '../proj/Units.js';
+import {METERS_PER_UNIT} from '../proj/Units.js';
 
 /**
  * @classdesc
@@ -153,7 +153,7 @@ Projection.prototype.getUnits = function() {
  * @api
  */
 Projection.prototype.getMetersPerUnit = function() {
-  return this.metersPerUnit_ || Units.METERS_PER_UNIT[this.units_];
+  return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];
 };
 
 
diff --git a/src/ol/proj/Units.js b/src/ol/proj/Units.js
index d41eb17de8..25b8041517 100644
--- a/src/ol/proj/Units.js
+++ b/src/ol/proj/Units.js
@@ -1,6 +1,7 @@
 /**
  * @module ol/proj/Units
  */
+
 /**
  * Projection units: `'degrees'`, `'ft'`, `'m'`, `'pixels'`, `'tile-pixels'` or
  * `'us-ft'`.
@@ -22,11 +23,11 @@ const Units = {
  * @type {Object.<ol.proj.Units, number>}
  * @api
  */
-Units.METERS_PER_UNIT = {};
+export const METERS_PER_UNIT = {};
 // use the radius of the Normal sphere
-Units.METERS_PER_UNIT[Units.DEGREES] =
-    2 * Math.PI * 6370997 / 360;
-Units.METERS_PER_UNIT[Units.FEET] = 0.3048;
-Units.METERS_PER_UNIT[Units.METERS] = 1;
-Units.METERS_PER_UNIT[Units.USFEET] = 1200 / 3937;
+METERS_PER_UNIT[Units.DEGREES] = 2 * Math.PI * 6370997 / 360;
+METERS_PER_UNIT[Units.FEET] = 0.3048;
+METERS_PER_UNIT[Units.METERS] = 1;
+METERS_PER_UNIT[Units.USFEET] = 1200 / 3937;
+
 export default Units;