diff --git a/common/cpw/mods/fml/common/registry/GameRegistry.java b/common/cpw/mods/fml/common/registry/GameRegistry.java
index 5760f805cf..5ec54ff59d 100644
--- a/common/cpw/mods/fml/common/registry/GameRegistry.java
+++ b/common/cpw/mods/fml/common/registry/GameRegistry.java
@@ -275,7 +275,7 @@ public class GameRegistry
     public static void registerTileEntityWithAlternatives(Class<? extends TileEntity> tileEntityClass, String id, String... alternatives)
     {
         TileEntity.func_70306_a(tileEntityClass, id);
-        Map<String,Class> teMappings = ObfuscationReflectionHelper.getPrivateValue(TileEntity.class, null, "field_70326_a", "a");
+        Map<String,Class> teMappings = ObfuscationReflectionHelper.getPrivateValue(TileEntity.class, null, "field_" + "70326_a", "field_70326_a", "a");
         for (String s: alternatives)
         {
             if (!teMappings.containsKey(s))