diff --git a/worldedit-core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java b/worldedit-core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java
index c3c6c58e77..e37ed51ced 100644
--- a/worldedit-core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java
+++ b/worldedit-core/src/main/java/com/sk89q/worldedit/command/RegionCommands.java
@@ -173,6 +173,7 @@ public int curve(Actor actor, EditSession editSession,
             return 0;
         }
         checkCommandArgument(thickness >= 0, "Thickness must be >= 0");
+        WorldEdit.getInstance().checkMaxRadius(thickness);
 
         ConvexPolyhedralRegion cpregion = (ConvexPolyhedralRegion) region;
         List<BlockVector3> vectors = new ArrayList<>(cpregion.getVertices());