diff --git a/Content.Server/Procedural/DungeonJob/DungeonJob.PostGenBiome.cs b/Content.Server/Procedural/DungeonJob/DungeonJob.PostGenBiome.cs
index d2fe317b48..8a40191e02 100644
--- a/Content.Server/Procedural/DungeonJob/DungeonJob.PostGenBiome.cs
+++ b/Content.Server/Procedural/DungeonJob/DungeonJob.PostGenBiome.cs
@@ -1,5 +1,6 @@
 using System.Threading.Tasks;
 using Content.Server.Parallax;
+using Content.Shared.Maps;
 using Content.Shared.Parallax.Biomes;
 using Content.Shared.Procedural;
 using Content.Shared.Procedural.PostGeneration;
@@ -31,6 +32,12 @@ public sealed partial class DungeonJob
             if (reservedTiles.Contains(node))
                 continue;
 
+            if (dunGen.TileMask is not null)
+            {
+                if (dunGen.TileMask.Contains(((ContentTileDefinition) _tileDefManager[tileRef.Value.Tile.TypeId]).ID))
+                    continue;
+            }
+
             // Need to set per-tile to override data.
             if (biomeSystem.TryGetTile(node, indexedBiome.Layers, seed, _grid, out var tile))
             {