diff --git a/src/main/scala/li/cil/oc/common/block/Delegator.scala b/src/main/scala/li/cil/oc/common/block/Delegator.scala
index 84dfe5410..9fb6f07e3 100644
--- a/src/main/scala/li/cil/oc/common/block/Delegator.scala
+++ b/src/main/scala/li/cil/oc/common/block/Delegator.scala
@@ -1,6 +1,6 @@
 package li.cil.oc.common.block
 
-import cpw.mods.fml.common.Optional
+import cpw.mods.fml.common.{FMLCommonHandler, Optional}
 import cpw.mods.fml.relauncher.{Side, SideOnly}
 import java.util
 import java.util.Random
@@ -342,7 +342,7 @@ class Delegator[Child <: Delegate] extends Block(Material.iron) {
     }
   }
 
-  override def getRenderType = BlockRenderer.getRenderId
+  override def getRenderType = if (FMLCommonHandler.instance.getEffectiveSide.isClient) BlockRenderer.getRenderId else -1
 
   override def getLightOpacity(world: IBlockAccess, x: Int, y: Int, z: Int) =
     subBlock(world, x, y, z) match {