diff --git a/planetiler-core/src/test/java/com/onthegomap/planetiler/util/LoopLineMergerTest.java b/planetiler-core/src/test/java/com/onthegomap/planetiler/util/LoopLineMergerTest.java
index 285e00cc05..fb91ae0bca 100644
--- a/planetiler-core/src/test/java/com/onthegomap/planetiler/util/LoopLineMergerTest.java
+++ b/planetiler-core/src/test/java/com/onthegomap/planetiler/util/LoopLineMergerTest.java
@@ -256,6 +256,23 @@ void testMergeCarriagewaysWithTwoSplits() {
     );
   }
 
+  @Test
+  void testRealWorldHarkingen() {
+    var merger = new LoopLineMerger()
+      .setMinLength(0)
+      .setLoopMinLength(8 * 0.0625);
+
+    merger.add(newLineString(99.185791015625,109.83056640625, 99.202392578125,109.8193359375, 99.21337890625,109.810302734375, 99.222412109375,109.8017578125, 99.229736328125,109.793701171875, 99.241943359375,109.779541015625));
+    merger.add(newLineString(98.9931640625,109.863525390625, 99.005126953125,109.862060546875, 99.01708984375,109.86083984375, 99.028564453125,109.85986328125, 99.040283203125,109.859375, 99.0712890625,109.85791015625, 99.08203125,109.857421875, 99.093017578125,109.856689453125, 99.104248046875,109.855712890625, 99.115478515625,109.8544921875, 99.12646484375,109.852783203125, 99.1376953125,109.850341796875, 99.1474609375,109.84765625, 99.15673828125,109.844482421875, 99.166748046875,109.84033203125, 99.175537109375,109.836181640625, 99.185791015625,109.83056640625));
+    merger.add(newLineString(99.162841796875,109.812744140625, 99.0966796875,109.824462890625, 99.055419921875,109.832275390625, 99.008544921875,109.842041015625, 98.967529296875,109.8525390625, 98.8818359375,109.875244140625));
+    merger.add(newLineString(98.879150390625,109.885498046875, 98.94091796875,109.86572265625, 98.968017578125,109.859130859375, 99.017578125,109.847412109375, 99.056396484375,109.83984375, 99.09814453125,109.831298828125, 99.163330078125,109.81982421875));
+      
+    assertEquals(
+      1,
+      merger.getMergedLineStrings().size()
+    );
+  }
+
   @ParameterizedTest
   @CsvSource({
     "mergelines_1759_point_line.wkb.gz,0,4",