diff --git a/src/main/java/net/minecraftforge/registries/RegistryBuilder.java b/src/main/java/net/minecraftforge/registries/RegistryBuilder.java
index 8bdfe7aac..c9a906266 100644
--- a/src/main/java/net/minecraftforge/registries/RegistryBuilder.java
+++ b/src/main/java/net/minecraftforge/registries/RegistryBuilder.java
@@ -34,7 +34,7 @@ public class RegistryBuilder<T extends IForgeRegistryEntry<T>>
     private Class<T> registryType;
     private ResourceLocation optionalDefaultKey;
     private int minId = 0;
-    private int maxId = Integer.MAX_VALUE;
+    private int maxId = Integer.MAX_VALUE - 1;
     private List<AddCallback<T>> addCallback = Lists.newArrayList();
     private List<ClearCallback<T>> clearCallback = Lists.newArrayList();
     private List<CreateCallback<T>> createCallback = Lists.newArrayList();