diff --git a/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeature.java b/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeature.java
index e98145b7c..1c436e39b 100644
--- a/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeature.java
+++ b/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeature.java
@@ -148,17 +148,13 @@ public Spec()
 
 	final IntPropertyMap< BranchSpot > endTimepointsMap;
 
-	final String lengthUnits;
-
-	BranchTimepointsFeature( final IntPropertyMap< BranchSpot > startTimepointsMap, final IntPropertyMap< BranchSpot > endTimepointsMap,
-			final String lengthUnits )
+	BranchTimepointsFeature( final IntPropertyMap< BranchSpot > startTimepointsMap, final IntPropertyMap< BranchSpot > endTimepointsMap )
 	{
 		this.startTimepointsMap = startTimepointsMap;
 		this.endTimepointsMap = endTimepointsMap;
-		this.lengthUnits = lengthUnits;
 		this.projectionMap = new LinkedHashMap<>( 2 );
 		projectionMap.put( key( START_PROJECTION_SPEC ),
-				FeatureProjections.project( key( START_PROJECTION_SPEC ), startTimepointsMap, lengthUnits ) );
+				FeatureProjections.project( key( START_PROJECTION_SPEC ), startTimepointsMap, Dimension.NONE_UNITS ) );
 		projectionMap.put( key( END_PROJECTION_SPEC ),
 				FeatureProjections.project( key( END_PROJECTION_SPEC ), endTimepointsMap, Dimension.NONE_UNITS ) );
 	}
diff --git a/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureComputer.java b/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureComputer.java
index d58e37780..19e3ea340 100644
--- a/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureComputer.java
+++ b/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureComputer.java
@@ -57,8 +57,7 @@ public void createOutput()
 		if ( null == output )
 			output = new BranchTimepointsFeature(
 					new IntPropertyMap<>( branchGraph.vertices().getRefPool(), -1 ),
-					new IntPropertyMap<>( branchGraph.vertices().getRefPool(), -1 ),
-					model.getSpaceUnits() );
+					new IntPropertyMap<>( branchGraph.vertices().getRefPool(), -1 ) );
 	}
 
 	@Override
diff --git a/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureSerializer.java b/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureSerializer.java
index 14a54db14..6ec472e43 100644
--- a/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureSerializer.java
+++ b/src/main/java/org/mastodon/mamut/feature/branch/timepoints/BranchTimepointsFeatureSerializer.java
@@ -67,13 +67,12 @@ public BranchTimepointsFeature deserialize(
 		final IntPropertyMap< Spot > endTimepointMap = new IntPropertyMap<>( graph.vertices(), -1 );
 		final IntPropertyMapSerializer< Spot > startTimepointSerializer = new IntPropertyMapSerializer<>( startTimepointMap );
 		final IntPropertyMapSerializer< Spot > endTimepointSerializer = new IntPropertyMapSerializer<>( endTimepointMap );
-		final String units = ois.readUTF();
 		startTimepointSerializer.readPropertyMap( idmap, ois );
 		endTimepointSerializer.readPropertyMap( idmap, ois );
 
 		// Map to branch-link -> val.
 		return new BranchTimepointsFeature( BranchFeatureSerializer.mapToBranchSpotMap( startTimepointMap, branchGraph ),
-				BranchFeatureSerializer.mapToBranchSpotMap( endTimepointMap, branchGraph ), units );
+				BranchFeatureSerializer.mapToBranchSpotMap( endTimepointMap, branchGraph ) );
 	}
 
 	@Override
@@ -90,7 +89,6 @@ public void serialize(
 				BranchFeatureSerializer.branchSpotMapToMap( feature.endTimepointsMap, branchGraph, graph );
 		final IntPropertyMapSerializer< Spot > startTimepointSerializer = new IntPropertyMapSerializer<>( startTimepointMap );
 		final IntPropertyMapSerializer< Spot > entTimepointsSerializer = new IntPropertyMapSerializer<>( endTimepointsMap );
-		oos.writeUTF( feature.lengthUnits );
 		startTimepointSerializer.writePropertyMap( idmap, oos );
 		entTimepointsSerializer.writePropertyMap( idmap, oos );
 	}