diff --git a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java
index 4e3424b8b..7671601d4 100644
--- a/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java
+++ b/worldedit-bukkit/src/main/java/com/sk89q/worldedit/bukkit/adapter/BukkitImplAdapter.java
@@ -64,6 +64,7 @@ import org.bukkit.inventory.ItemStack;
 import javax.annotation.Nullable;
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.List;
 import java.util.Map;
 import java.util.OptionalInt;
 import java.util.Set;
@@ -335,7 +336,7 @@ public interface BukkitImplAdapter<T> extends IBukkitAdapter {
         return new NMSRelighterFactory(); // TODO implement in adapters instead
     }
 
-    default Map<String, ? extends Property<?>> getAllProperties() {
+    default Map<String, List<Property<?>>> getAllProperties() {
         return Collections.emptyMap();
     }
     //FAWE end