diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/world/SimpleWorld.java b/worldedit-core/src/main/java/com/sk89q/worldedit/world/SimpleWorld.java
index 0ff482b80..7f704d4e1 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/world/SimpleWorld.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/world/SimpleWorld.java
@@ -27,6 +27,7 @@ import com.sk89q.worldedit.WorldEditException;
 import com.sk89q.worldedit.blocks.BaseItem;
 import com.sk89q.worldedit.blocks.BaseItemStack;
 import com.sk89q.worldedit.extension.platform.Platform;
+import com.sk89q.worldedit.function.mask.BlockMask;
 import com.sk89q.worldedit.function.mask.BlockTypeMask;
 import com.sk89q.worldedit.function.mask.Mask;
 import com.sk89q.worldedit.math.BlockVector2;