diff --git a/src/main/java/org/ultramine/server/UltraminePlugin.java b/src/main/java/org/ultramine/server/UltraminePlugin.java
index 4bbd9e8..b81b91c 100644
--- a/src/main/java/org/ultramine/server/UltraminePlugin.java
+++ b/src/main/java/org/ultramine/server/UltraminePlugin.java
@@ -5,6 +5,8 @@
 import java.io.File;
 import java.util.Map;
 
+import net.minecraft.launchwrapper.LaunchClassLoader;
+
 public class UltraminePlugin implements IFMLLoadingPlugin
 {
 	public static File location;
@@ -12,7 +14,9 @@
 	@Override
 	public String[] getASMTransformerClass()
 	{
-		return new String[0];
+		return new String[]{
+				"org.ultramine.server.asm.transformers.Compat172BlockSend"
+		};
 	}
 
 	@Override
@@ -31,6 +35,7 @@
 	public void injectData(Map<String, Object> data)
 	{
 		location = (File)data.get("coremodLocation");
+		((LaunchClassLoader)this.getClass().getClassLoader()).addTransformerExclusion("org.ultramine.server.asm.");
 	}
 
 	@Override
diff --git a/src/main/java/org/ultramine/server/asm/transformers/Compat172BlockSend.java b/src/main/java/org/ultramine/server/asm/transformers/Compat172BlockSend.java
new file mode 100644
index 0000000..563e3cb
--- /dev/null
+++ b/src/main/java/org/ultramine/server/asm/transformers/Compat172BlockSend.java
@@ -0,0 +1,51 @@
+package org.ultramine.server.asm.transformers;
+
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.ClassWriter;
+import org.objectweb.asm.MethodVisitor;
+import org.objectweb.asm.Opcodes;
+
+import net.minecraft.launchwrapper.IClassTransformer;
+
+public class Compat172BlockSend implements IClassTransformer
+{
+	@Override
+	public byte[] transform(String name, String transformedName, byte[] basicClass)
+	{
+		if(name.startsWith("ttftcuts.atg."))
+		{
+			ClassReader reader = new ClassReader(basicClass);
+			ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
+
+			ClassVisitor visitor = new ChangeDescVisitor(writer);
+
+			reader.accept(visitor, 0);
+			return writer.toByteArray();
+		}
+		
+		return basicClass;
+	}
+	
+	public static class ChangeDescVisitor extends ClassVisitor
+	{
+		private ChangeDescVisitor(ClassVisitor cv)
+		{
+			super(Opcodes.ASM4, cv);
+		}
+		
+		@Override
+		public MethodVisitor visitMethod(int mAccess, final String mName, final String mDesc, String mSignature, String[] mExceptions)
+		{
+			return new MethodVisitor(Opcodes.ASM4, super.visitMethod(mAccess, mName, mDesc, mSignature, mExceptions))
+			{
+				public void visitFieldInsn(int opcode, String owner, String name, String desc)
+				{
+					if(opcode == Opcodes.GETSTATIC && owner.equals("net/minecraft/init/Blocks") && name.equals("field_150354_m") && desc.equals("Lnet/minecraft/block/Block;"))
+						desc = "Lnet/minecraft/block/BlockSand;";
+					super.visitFieldInsn(opcode, owner, name, desc);
+				}
+			};
+		}
+	}
+}