diff --git a/items/materials/ItemMultiMaterial.java b/items/materials/ItemMultiMaterial.java
index e71b0ce6..941dff77 100644
--- a/items/materials/ItemMultiMaterial.java
+++ b/items/materials/ItemMultiMaterial.java
@@ -201,10 +201,14 @@ public class ItemMultiMaterial extends AEBaseItem implements IStorageComponent,
 	{
 		for (MaterialType mat : MaterialType.values())
 		{
-			if ( mat.damageValue != -1 && mat != MaterialType.InvalidType )
+			if ( mat.damageValue != -1 )
 			{
-				String tex = "appliedenergistics2:" + nameOf( new ItemStack( this, 1, mat.damageValue ) );
-				mat.IIcon = icoRegister.registerIcon( tex );
+				ItemStack what = new ItemStack( this, 1, mat.damageValue );
+				if ( getTypeByStack( what ) != MaterialType.InvalidType )
+				{
+					String tex = "appliedenergistics2:" + nameOf( what );
+					mat.IIcon = icoRegister.registerIcon( tex );
+				}
 			}
 		}
 	}