diff --git a/src/main/java/org/dimdev/dimdoors/rift/registry/LinkProperties.java b/src/main/java/org/dimdev/dimdoors/rift/registry/LinkProperties.java
index 14271639..a8649b34 100644
--- a/src/main/java/org/dimdev/dimdoors/rift/registry/LinkProperties.java
+++ b/src/main/java/org/dimdev/dimdoors/rift/registry/LinkProperties.java
@@ -2,6 +2,7 @@ package org.dimdev.dimdoors.rift.registry;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.Objects;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -111,7 +112,7 @@ public class LinkProperties {
 	public static class LinkPropertiesBuilder {
 		private float floatingWeight;
 		private float entranceWeight;
-		private Set<Integer> groups;
+		private Set<Integer> groups = Collections.emptySet();
 		private int linksRemaining;
 		private boolean oneWay;
 
diff --git a/src/main/java/org/dimdev/dimdoors/world/feature/gateway/Gateway.java b/src/main/java/org/dimdev/dimdoors/world/feature/gateway/Gateway.java
index c620bbd0..cb33daa6 100644
--- a/src/main/java/org/dimdev/dimdoors/world/feature/gateway/Gateway.java
+++ b/src/main/java/org/dimdev/dimdoors/world/feature/gateway/Gateway.java
@@ -16,7 +16,7 @@ public interface Gateway {
     }
 
     default boolean isLocationValid(StructureWorldAccess world, BlockPos pos) {
-        return this.isBiomeValid(BuiltinRegistries.BIOME.getKey(world.getBiome(pos)).orElseThrow(NullPointerException::new));
+        return this.isBiomeValid(world.getBiomeKey(pos).orElseThrow(NullPointerException::new));
     }
 
     Set<RegistryKey<Biome>> getBiomes();