diff --git a/src/main/java/dan200/computercraft/shared/peripheral/monitor/BlockMonitor.java b/src/main/java/dan200/computercraft/shared/peripheral/monitor/BlockMonitor.java
index 104ef94cc..50d61c5e2 100644
--- a/src/main/java/dan200/computercraft/shared/peripheral/monitor/BlockMonitor.java
+++ b/src/main/java/dan200/computercraft/shared/peripheral/monitor/BlockMonitor.java
@@ -49,9 +49,18 @@ public class BlockMonitor extends BlockGeneric
     @Override
     public BlockRenderLayer getRenderLayer()
     {
+        // We use the CUTOUT layer, as otherwise monitor rendering will cause flickering.
         return BlockRenderLayer.CUTOUT;
     }
 
+    @Override
+    @Deprecated
+    public boolean isSolid( BlockState p_200124_1_ )
+    {
+        // We override isSolid, as our overriding of getRenderLayer means that it would otherwise return false.
+        return true;
+    }
+
     @Override
     protected void fillStateContainer( StateContainer.Builder<Block, BlockState> builder )
     {