diff --git a/src/main/java/io/github/sefiraat/networks/slimefun/network/NetworkDirectional.java b/src/main/java/io/github/sefiraat/networks/slimefun/network/NetworkDirectional.java
index c2b64e519..6751a0420 100644
--- a/src/main/java/io/github/sefiraat/networks/slimefun/network/NetworkDirectional.java
+++ b/src/main/java/io/github/sefiraat/networks/slimefun/network/NetworkDirectional.java
@@ -333,7 +333,7 @@ public static ItemStack getDirectionalSlotPane(@Nonnull BlockFace blockFace, @No
 
     @Nonnull
     public static ItemStack getDirectionalSlotPane(@Nonnull BlockFace blockFace, @Nonnull Material blockMaterial, boolean active) {
-        if (blockMaterial.isItem() && !blockMaterial.isAir()) {
+        if (blockMaterial.isItem() && !blockMaterial.isAir() && blockMaterial.getHardness() >= 0)) {
             final ItemStack displayStack = new CustomItemStack(
                 blockMaterial,
                 Theme.PASSIVE + "Direction " + blockFace.name() + " (" + blockMaterial.name() + ")"