diff --git a/src/api/java/dev/redstudio/alfheim/lighting/LightingEngine.java b/src/api/java/dev/redstudio/alfheim/lighting/LightingEngine.java
new file mode 100644
index 000000000..be8d7613f
--- /dev/null
+++ b/src/api/java/dev/redstudio/alfheim/lighting/LightingEngine.java
@@ -0,0 +1,5 @@
+package dev.redstudio.alfheim.lighting;
+
+// stub class for Alfheim v1.6+
+public class LightingEngine {
+}
diff --git a/src/main/java/mod/acgaming/universaltweaks/mods/compactmachines/memory/mixin/UTProxyWorldMixin.java b/src/main/java/mod/acgaming/universaltweaks/mods/compactmachines/memory/mixin/UTProxyWorldMixin.java
index e6f9f1e07..acf7993e1 100644
--- a/src/main/java/mod/acgaming/universaltweaks/mods/compactmachines/memory/mixin/UTProxyWorldMixin.java
+++ b/src/main/java/mod/acgaming/universaltweaks/mods/compactmachines/memory/mixin/UTProxyWorldMixin.java
@@ -21,6 +21,7 @@
 import net.minecraftforge.fml.common.Optional;
 import net.minecraftforge.fml.relauncher.FMLLaunchHandler;
 
+import dev.redstudio.alfheim.lighting.LightingEngine;
 import mod.acgaming.universaltweaks.mods.compactmachines.memory.DummyWorld;
 import org.dave.compactmachines3.world.ProxyWorld;
 import org.spongepowered.asm.mixin.*;
@@ -166,10 +167,9 @@ public World init()
         return this;
     }
 
-    @SuppressWarnings("NullableProblems")
     @Override
     @Optional.Method(modid = "alfheim")
-    public int getLightFromNeighborsFor(EnumSkyBlock type, BlockPos pos)
+    public int getLightFromNeighborsFor(@Nonnull EnumSkyBlock type, @Nonnull BlockPos pos)
     {
         return 15;
     }
@@ -180,4 +180,10 @@ public int getLightFromNeighborsFor(EnumSkyBlock type, BlockPos pos)
     {
         return 15;
     }
+
+    @SuppressWarnings({"MissingUnique", "unused"})
+    @Optional.Method(modid = "alfheim")
+    public LightingEngine getAlfheim$lightingEngine() {
+        return null;
+    }
 }