diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java b/worldedit-core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java
index cf0a93503..b61651aba 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/regions/CuboidRegion.java
@@ -329,16 +329,16 @@ public class CuboidRegion extends AbstractRegion implements FlatRegion {
 
     @Override
     public boolean contains(Vector position) {
-        double x = position.getX();
-        double y = position.getY();
-        double z = position.getZ();
+        int x = position.getBlockX();
+        int y = position.getBlockY();
+        int z = position.getBlockZ();
 
         Vector min = getMinimumPoint();
         Vector max = getMaximumPoint();
 
-        return x >= min.getBlockX() && x < max.getBlockX() + 1
-                && y >= min.getBlockY() && y < max.getBlockY() + 1
-                && z >= min.getBlockZ() && z < max.getBlockZ() + 1;
+        return x >= min.getBlockX() && x <= max.getBlockX()
+                && y >= min.getBlockY() && y <= max.getBlockY()
+                && z >= min.getBlockZ() && z <= max.getBlockZ();
     }
 
     @Override