diff --git a/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB1.java b/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB1.java
index 46fe4065..f1b00558 100644
--- a/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB1.java
+++ b/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB1.java
@@ -1,5 +1,6 @@
 package gregtech.common.blocks;
 
+import cpw.mods.fml.common.registry.GameRegistry;
 import gregtech.api.GregTech_API;
 import gregtech.api.enums.Materials;
 import gregtech.api.enums.OrePrefixes;
@@ -9,7 +10,7 @@ import net.minecraft.block.Block;
 import net.minecraft.block.material.Material;
 
 public class GT_Block_Ores_UB1 extends GT_Block_Ores_Abstract {
-    Block aUBBlock = (Block) Block.blockRegistry.getObject("UndergroundBiomes:igneousStone");
+    Block aUBBlock = GameRegistry.findBlock("UndergroundBiomes", "igneousStone");
 
     public GT_Block_Ores_UB1() {
         super("gt.blockores.ub1", true, Material.rock);
diff --git a/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB2.java b/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB2.java
index ffce796c..7b2ff5cd 100644
--- a/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB2.java
+++ b/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB2.java
@@ -1,5 +1,6 @@
 package gregtech.common.blocks;
 
+import cpw.mods.fml.common.registry.GameRegistry;
 import gregtech.api.GregTech_API;
 import gregtech.api.enums.Materials;
 import gregtech.api.enums.OrePrefixes;
@@ -9,7 +10,7 @@ import net.minecraft.block.Block;
 import net.minecraft.block.material.Material;
 
 public class GT_Block_Ores_UB2 extends GT_Block_Ores_Abstract {
-    Block aUBBlock = (Block) Block.blockRegistry.getObject("UndergroundBiomes:metamorphicStone");
+    Block aUBBlock = GameRegistry.findBlock("UndergroundBiomes", "metamorphicStone");
 
     public GT_Block_Ores_UB2() {
         super("gt.blockores.ub2", true, Material.rock);
diff --git a/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB3.java b/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB3.java
index 52c8aa60..b2dc7d92 100644
--- a/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB3.java
+++ b/src/main/java/gregtech/common/blocks/GT_Block_Ores_UB3.java
@@ -1,5 +1,6 @@
 package gregtech.common.blocks;
 
+import cpw.mods.fml.common.registry.GameRegistry;
 import gregtech.api.GregTech_API;
 import gregtech.api.enums.Materials;
 import gregtech.api.enums.OrePrefixes;
@@ -9,7 +10,7 @@ import net.minecraft.block.Block;
 import net.minecraft.block.material.Material;
 
 public class GT_Block_Ores_UB3 extends GT_Block_Ores_Abstract {
-    Block aUBBlock = (Block) Block.blockRegistry.getObject("UndergroundBiomes:sedimentaryStone");
+    Block aUBBlock = GameRegistry.findBlock("UndergroundBiomes", "sedimentaryStone");
 
     public GT_Block_Ores_UB3() {
         super("gt.blockores.ub3", true, Material.rock);