diff --git a/biomes/hot/desert-dunes-red.json b/biomes/hot/desert-dunes-red.json
index 52093d77..da1f7ad8 100644
--- a/biomes/hot/desert-dunes-red.json
+++ b/biomes/hot/desert-dunes-red.json
@@ -77,7 +77,7 @@
         },
         {
             "chance": 0.0015,
-            "mode": "MIN_HEIGHT",
+            "mode": "VACUUM",
             "rotation": {
                 "yAxis": {
                     "min": 0,
diff --git a/biomes/hot/desert-dunes.json b/biomes/hot/desert-dunes.json
index 3eb1c438..1ec9a6f1 100644
--- a/biomes/hot/desert-dunes.json
+++ b/biomes/hot/desert-dunes.json
@@ -55,7 +55,7 @@
         },
         {
             "chance": 0.0015,
-            "mode": "MIN_HEIGHT",
+            "mode": "VACUUM",
             "rotation": {
                 "yAxis": {
                     "min": 0,