diff --git a/src/main/scala/li/cil/oc/server/component/traits/WorldAware.scala b/src/main/scala/li/cil/oc/server/component/traits/WorldAware.scala
index 56bc16711..cca1a7e61 100644
--- a/src/main/scala/li/cil/oc/server/component/traits/WorldAware.scala
+++ b/src/main/scala/li/cil/oc/server/component/traits/WorldAware.scala
@@ -79,6 +79,9 @@ trait WorldAware {
           MinecraftForge.EVENT_BUS.post(event)
           (event.isCanceled, "replaceable")
         }
+        else if (block.getCollisionBoundingBoxFromPool(blockPos) == null) {
+          (true, "passable")
+        }
         else {
           (true, "solid")
         }
diff --git a/src/main/scala/li/cil/oc/util/ExtendedBlock.scala b/src/main/scala/li/cil/oc/util/ExtendedBlock.scala
index 2053d0fd4..6cfabdd76 100644
--- a/src/main/scala/li/cil/oc/util/ExtendedBlock.scala
+++ b/src/main/scala/li/cil/oc/util/ExtendedBlock.scala
@@ -16,6 +16,8 @@ object ExtendedBlock {
     def setBlockBoundsBasedOnState(position: BlockPosition) = block.setBlockBoundsBasedOnState(position.world.get, position.x, position.y, position.z)
 
     def getSelectedBoundingBoxFromPool(position: BlockPosition) = block.getSelectedBoundingBoxFromPool(position.world.get, position.x, position.y, position.z)
+
+    def getCollisionBoundingBoxFromPool(position: BlockPosition) = block.getCollisionBoundingBoxFromPool(position.world.get, position.x, position.y, position.z)
   }
 
 }