diff --git a/src/ol/geom/flat/straightchunk.js b/src/ol/geom/flat/straightchunk.js
index 16c77598bc..f394537724 100644
--- a/src/ol/geom/flat/straightchunk.js
+++ b/src/ol/geom/flat/straightchunk.js
@@ -1,7 +1,6 @@
 /**
  * @module ol/geom/flat/straightchunk
  */
-const _ol_geom_flat_straightchunk_ = {};
 
 
 /**
@@ -13,7 +12,7 @@ const _ol_geom_flat_straightchunk_ = {};
  * @return {Array.<number>} Start and end of the first suitable chunk of the
  * given `flatCoordinates`.
  */
-_ol_geom_flat_straightchunk_.lineString = function(maxAngle, flatCoordinates, offset, end, stride) {
+export function matchingChunk(maxAngle, flatCoordinates, offset, end, stride) {
   let chunkStart = offset;
   let chunkEnd = offset;
   let chunkM = 0;
@@ -49,5 +48,4 @@ _ol_geom_flat_straightchunk_.lineString = function(maxAngle, flatCoordinates, of
   }
   m += m23;
   return m > chunkM ? [start, i] : [chunkStart, chunkEnd];
-};
-export default _ol_geom_flat_straightchunk_;
+}
diff --git a/src/ol/render/canvas/TextReplay.js b/src/ol/render/canvas/TextReplay.js
index f24b19a6c6..9db0c5305b 100644
--- a/src/ol/render/canvas/TextReplay.js
+++ b/src/ol/render/canvas/TextReplay.js
@@ -5,7 +5,7 @@ import {getUid, inherits} from '../../index.js';
 import {asColorLike} from '../../colorlike.js';
 import {createCanvasContext2D} from '../../dom.js';
 import {intersects} from '../../extent.js';
-import _ol_geom_flat_straightchunk_ from '../../geom/flat/straightchunk.js';
+import {matchingChunk} from '../../geom/flat/straightchunk.js';
 import GeometryType from '../../geom/GeometryType.js';
 import {CANVAS_LINE_DASH, SAFARI} from '../../has.js';
 import _ol_render_canvas_ from '../canvas.js';
@@ -202,7 +202,7 @@ CanvasTextReplay.prototype.drawText = function(geometry, feature) {
     let flatEnd;
     for (let o = 0, oo = ends.length; o < oo; ++o) {
       if (textAlign == undefined) {
-        const range = _ol_geom_flat_straightchunk_.lineString(
+        const range = matchingChunk(
           textState.maxAngle, flatCoordinates, flatOffset, ends[o], stride);
         flatOffset = range[0];
         flatEnd = range[1];
diff --git a/test/spec/ol/geom/flat/straightchunk.test.js b/test/spec/ol/geom/flat/straightchunk.test.js
index 087ebf6a2b..7b58017117 100644
--- a/test/spec/ol/geom/flat/straightchunk.test.js
+++ b/test/spec/ol/geom/flat/straightchunk.test.js
@@ -1,4 +1,4 @@
-import _ol_geom_flat_straightchunk_ from '../../../../../src/ol/geom/flat/straightchunk.js';
+import {matchingChunk} from '../../../../../src/ol/geom/flat/straightchunk.js';
 
 
 describe('ol.geom.flat.straightchunk', function() {
@@ -10,12 +10,12 @@ describe('ol.geom.flat.straightchunk', function() {
       const stride = 3;
 
       it('returns whole line with angle delta', function() {
-        const got = _ol_geom_flat_straightchunk_.lineString(Math.PI / 4, flatCoords, 0, 6, stride);
+        const got = matchingChunk(Math.PI / 4, flatCoords, 0, 6, stride);
         expect(got).to.eql([0, 6]);
       });
 
       it('returns whole line with zero angle delta', function() {
-        const got = _ol_geom_flat_straightchunk_.lineString(0, flatCoords, 0, 6, stride);
+        const got = matchingChunk(0, flatCoords, 0, 6, stride);
         expect(got).to.eql([0, 6]);
       });
 
@@ -26,12 +26,12 @@ describe('ol.geom.flat.straightchunk', function() {
       const stride = 2;
 
       it('returns whole line if straight enough', function() {
-        const got = _ol_geom_flat_straightchunk_.lineString(Math.PI, flatCoords, 0, 8, stride);
+        const got = matchingChunk(Math.PI, flatCoords, 0, 8, stride);
         expect(got).to.eql([0, 8]);
       });
 
       it('returns first matching chunk if all chunk lengths are the same', function() {
-        const got = _ol_geom_flat_straightchunk_.lineString(Math.PI / 4, flatCoords, 0, 8, stride);
+        const got = matchingChunk(Math.PI / 4, flatCoords, 0, 8, stride);
         expect(got).to.eql([0, 4]);
       });
 
@@ -42,12 +42,12 @@ describe('ol.geom.flat.straightchunk', function() {
       const stride = 2;
 
       it('returns stright chunk from within the linestring', function() {
-        const got = _ol_geom_flat_straightchunk_.lineString(0, flatCoords, 0, 18, stride);
+        const got = matchingChunk(0, flatCoords, 0, 18, stride);
         expect(got).to.eql([10, 16]);
       });
 
       it('returns long chunk at the end if angle and length within threshold', function() {
-        const got = _ol_geom_flat_straightchunk_.lineString(Math.PI / 4, flatCoords, 0, 18, stride);
+        const got = matchingChunk(Math.PI / 4, flatCoords, 0, 18, stride);
         expect(got).to.eql([10, 18]);
       });