diff --git a/core/src/main/java/com/boydti/fawe/object/brush/sweep/ClipboardSpline.java b/core/src/main/java/com/boydti/fawe/object/brush/sweep/ClipboardSpline.java
index c9cf335c..e8adafb6 100644
--- a/core/src/main/java/com/boydti/fawe/object/brush/sweep/ClipboardSpline.java
+++ b/core/src/main/java/com/boydti/fawe/object/brush/sweep/ClipboardSpline.java
@@ -6,6 +6,7 @@ import com.sk89q.worldedit.MaxChangedBlocksException;
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import com.sk89q.worldedit.function.operation.ForwardExtentCopy;
+import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.function.operation.Operations;
 import com.sk89q.worldedit.math.interpolation.Interpolation;
 import com.sk89q.worldedit.math.transform.AffineTransform;
@@ -98,7 +99,7 @@ public class ClipboardSpline extends Spline {
         final int offY = functionOffset.getBlockY();
         final int offZ = functionOffset.getBlockZ();
 
-        ForwardExtentCopy operation = clipboardHolder
+        Operation operation = clipboardHolder
                 .createPaste(editSession, editSession.getWorldData())
                 .to(target)
                 .ignoreAirBlocks(true)
@@ -110,6 +111,6 @@ public class ClipboardSpline extends Spline {
         clipboardHolder.setTransform(originalTransform);
         clipboard.setOrigin(originalOrigin);
 
-        return operation.getAffected();
+        return operation instanceof ForwardExtentCopy ? ((ForwardExtentCopy) operation).getAffected() : 0;
     }
 }
\ No newline at end of file
diff --git a/core/src/main/java/com/sk89q/worldedit/session/PasteBuilder.java b/core/src/main/java/com/sk89q/worldedit/session/PasteBuilder.java
index 06d9b7cc..03e343e3 100644
--- a/core/src/main/java/com/sk89q/worldedit/session/PasteBuilder.java
+++ b/core/src/main/java/com/sk89q/worldedit/session/PasteBuilder.java
@@ -30,6 +30,7 @@ import com.sk89q.worldedit.function.RegionFunction;
 import com.sk89q.worldedit.function.mask.ExistingBlockMask;
 import com.sk89q.worldedit.function.mask.Mask;
 import com.sk89q.worldedit.function.operation.ForwardExtentCopy;
+import com.sk89q.worldedit.function.operation.Operation;
 import com.sk89q.worldedit.math.transform.Transform;
 import com.sk89q.worldedit.world.registry.WorldData;
 
@@ -112,7 +113,7 @@ public class PasteBuilder {
      *
      * @return the operation
      */
-    public ForwardExtentCopy build() {
+    public Operation build() {
         Extent extent = clipboard;
         if (!transform.isIdentity()) {
             extent = new BlockTransformExtent(extent, transform, targetWorldData.getBlockRegistry());