diff --git a/worldgeneratorapi-impl/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/InjectedBiomeGenerator.java b/worldgeneratorapi-impl/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/InjectedBiomeGenerator.java
index 9da3849..5c38fd0 100644
--- a/worldgeneratorapi-impl/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/InjectedBiomeGenerator.java
+++ b/worldgeneratorapi-impl/src/main/java/nl/rutgerkok/worldgeneratorapi/internal/InjectedBiomeGenerator.java
@@ -2,6 +2,7 @@ package nl.rutgerkok.worldgeneratorapi.internal;
 
 import static java.util.stream.Collectors.toList;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.Set;
 
@@ -14,8 +15,8 @@ import net.minecraft.server.v1_16_R1.BiomeBase;
 import net.minecraft.server.v1_16_R1.Biomes;
 import net.minecraft.server.v1_16_R1.IRegistry;
 import net.minecraft.server.v1_16_R1.WorldChunkManager;
-import net.minecraft.server.v1_16_R1.WorldChunkManagerHell;
 import nl.rutgerkok.worldgeneratorapi.BiomeGenerator;
+import nl.rutgerkok.worldgeneratorapi.WorldGeneratorApi;
 
 public class InjectedBiomeGenerator extends WorldChunkManager {
 
@@ -25,10 +26,13 @@ public class InjectedBiomeGenerator extends WorldChunkManager {
      * generators.) Instead, we serialize as if we are a biome generator that
      * generates only oceans.
      */
-    private static final Codec<WorldChunkManagerHell> DUMMY_CODEC = IRegistry.BIOME.fieldOf("biome")
-            .xmap(biome -> new WorldChunkManagerHell(biome), biomeGenToSerialize -> {
+    private static final Codec<InjectedBiomeGenerator> DUMMY_CODEC = IRegistry.BIOME.fieldOf(
+            "[" + WorldGeneratorApi.class.getSimpleName()
+                    + "] Custom biome generators cannot be stored in the level.dat, please ignore this error")
+            .xmap(biome -> new InjectedBiomeGenerator(), biomeGenToSerialize -> {
+                // Serializes as a single-biome generator
                 return Biomes.OCEAN;
-                    })
+            })
             .stable().codec();
 
     private static List<BiomeBase> toBiomeBase(Set<Biome> biomes) {
@@ -53,6 +57,16 @@ public class InjectedBiomeGenerator extends WorldChunkManager {
 
     private final BiomeGenerator biomeGenerator;
 
+    /**
+     * Constructor only used for deserialization. Just provides a dummy biome
+     * generator, as the biome generator plugin should inject its own biome
+     * generator.
+     */
+    private InjectedBiomeGenerator() {
+        super(Arrays.asList(Biomes.OCEAN));
+        this.biomeGenerator = (x, y, z) -> Biome.OCEAN;
+    }
+
     public InjectedBiomeGenerator(BiomeGenerator biomeGenerator) {
         super(toBiomeBase(biomeGenerator.getStructureBiomes()));