diff --git a/src/main/java/net/imagej/ops/geom/geom3d/DefaultInertiaTensor3D.java b/src/main/java/net/imagej/ops/geom/geom3d/DefaultInertiaTensor3D.java
index 7f5970ee7..ac5da2ede 100644
--- a/src/main/java/net/imagej/ops/geom/geom3d/DefaultInertiaTensor3D.java
+++ b/src/main/java/net/imagej/ops/geom/geom3d/DefaultInertiaTensor3D.java
@@ -66,7 +66,7 @@ public void initialize() {
 	@Override
 	public RealMatrix calculate(final IterableRegion<B> input) {
 		final BlockRealMatrix output = new BlockRealMatrix(3, 3);
-		Cursor<Void> c = input.localizingCursor();
+		Cursor<Void> c = input.inside().localizingCursor();
 		double[] pos = new double[3];
 		double[] computedCentroid = new double[3];
 		centroid.calculate(input).localize(computedCentroid);
@@ -87,7 +87,7 @@ public RealMatrix calculate(final IterableRegion<B> input) {
 			output.setEntry(2, 1, output.getEntry(1, 2));
 		}
 
-		final double size = input.size();
+		final double size = input.inside().size();
 		output.setEntry(0, 0, output.getEntry(0, 0) / size);
 		output.setEntry(0, 1, output.getEntry(0, 1) / size);
 		output.setEntry(0, 2, output.getEntry(0, 2) / size);
diff --git a/src/main/java/net/imagej/ops/image/watershed/Watershed.java b/src/main/java/net/imagej/ops/image/watershed/Watershed.java
index 57f66b4aa..4cf558690 100644
--- a/src/main/java/net/imagej/ops/image/watershed/Watershed.java
+++ b/src/main/java/net/imagej/ops/image/watershed/Watershed.java
@@ -137,7 +137,7 @@ public void compute(final RandomAccessibleInterval<T> in, final ImgLabeling<Inte
 		final List<Long> imiList = new ArrayList<>();
 
 		if (mask != null) {
-			final Cursor<Void> c = Regions.iterable(mask).localizingCursor();
+			final Cursor<Void> c = Regions.iterable(mask).inside().localizingCursor();
 			while (c.hasNext()) {
 				c.next();
 				imiList.add(IntervalIndexer.positionToIndex(c, in));