diff --git a/src/main/java/biomesoplenty/common/init/ModBiomes.java b/src/main/java/biomesoplenty/common/init/ModBiomes.java
index a12ea67bc..b2625b8cc 100644
--- a/src/main/java/biomesoplenty/common/init/ModBiomes.java
+++ b/src/main/java/biomesoplenty/common/init/ModBiomes.java
@@ -39,7 +39,7 @@ public class ModBiomes
     private static int nextBiomeId = 40;
     private static File biomeIdMapFile;
     private static BOPConfig.IConfigObj biomeIdMapConf;
-    private static Map<String, Integer> biomeIdMap;
+    protected static Map<String, Integer> biomeIdMap;
     private static Set<Integer> idsReservedInConfig;
     public static Map<Integer, List<Integer>> subBiomesMap;
     public static Map<Integer, List<Integer>> mutatedBiomesMap;
diff --git a/src/main/java/biomesoplenty/common/init/ModChecks.java b/src/main/java/biomesoplenty/common/init/ModChecks.java
new file mode 100644
index 000000000..d0715a83b
--- /dev/null
+++ b/src/main/java/biomesoplenty/common/init/ModChecks.java
@@ -0,0 +1,37 @@
+package biomesoplenty.common.init;
+
+import java.util.Map;
+import java.util.Map.Entry;
+
+import biomesoplenty.common.util.biome.BiomeUtils;
+import biomesoplenty.core.BiomesOPlenty;
+import net.minecraft.world.biome.BiomeGenBase;
+
+public class ModChecks 
+{
+	public static void postInit()
+	{
+		verifyBiomeIds();
+	}
+	
+	private static void verifyBiomeIds()
+	{
+		BiomesOPlenty.logger.info("Checking for biome id conflicts...");
+		
+		Map<String, Integer> biomeIdMap = ModBiomes.biomeIdMap;
+		
+		for (Entry<String, Integer> entry : biomeIdMap.entrySet())
+		{
+			String biomeIdentifier = entry.getKey();
+			int id = entry.getValue();
+			BiomeGenBase biome = BiomeGenBase.getBiome(id);
+
+			if (biome == null || !BiomeUtils.getBiomeIdentifier(biome).equals(biomeIdentifier))
+			{
+				throw new RuntimeException("Unexpected biome " + biome.biomeName + " for id " + id + ". This is not a bug, please ensure your biome ids are configured to be unique.");
+			}
+		}
+		
+		BiomesOPlenty.logger.info("No conflicts found");
+	}
+}
diff --git a/src/main/java/biomesoplenty/core/BiomesOPlenty.java b/src/main/java/biomesoplenty/core/BiomesOPlenty.java
index 324a7e4e5..10b913428 100644
--- a/src/main/java/biomesoplenty/core/BiomesOPlenty.java
+++ b/src/main/java/biomesoplenty/core/BiomesOPlenty.java
@@ -10,6 +10,21 @@ package biomesoplenty.core;
 
 import java.io.File;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import biomesoplenty.common.command.BOPCommand;
+import biomesoplenty.common.init.ModBiomes;
+import biomesoplenty.common.init.ModBlockQueries;
+import biomesoplenty.common.init.ModBlocks;
+import biomesoplenty.common.init.ModChecks;
+import biomesoplenty.common.init.ModConfiguration;
+import biomesoplenty.common.init.ModCrafting;
+import biomesoplenty.common.init.ModEntities;
+import biomesoplenty.common.init.ModGenerators;
+import biomesoplenty.common.init.ModHandlers;
+import biomesoplenty.common.init.ModItems;
+import biomesoplenty.common.init.ModPotions;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.Mod.EventHandler;
 import net.minecraftforge.fml.common.Mod.Instance;
@@ -19,12 +34,6 @@ import net.minecraftforge.fml.common.event.FMLPostInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLServerStartingEvent;
 
-import org.apache.logging.log4j.LogManager;
-import org.apache.logging.log4j.Logger;
-
-import biomesoplenty.common.command.BOPCommand;
-import biomesoplenty.common.init.*;
-
 @Mod(modid = BiomesOPlenty.MOD_ID, name = BiomesOPlenty.MOD_NAME, dependencies = "required-after:Forge@[11.14.3.1468,)")
 public class BiomesOPlenty
 {
@@ -67,6 +76,12 @@ public class BiomesOPlenty
         proxy.registerRenderers();
     }
     
+    @EventHandler
+    public void postInit(FMLPostInitializationEvent event)
+    {
+        ModChecks.postInit();
+    }
+    
     @EventHandler
     public void serverStarting(FMLServerStartingEvent event)
     {