diff --git a/CubicChunksAPI/src/main/java/io/github/opencubicchunks/cubicchunks/api/world/IMinMaxHeight.java b/CubicChunksAPI/src/main/java/io/github/opencubicchunks/cubicchunks/api/world/IMinMaxHeight.java
index cfb173021..011b8827f 100644
--- a/CubicChunksAPI/src/main/java/io/github/opencubicchunks/cubicchunks/api/world/IMinMaxHeight.java
+++ b/CubicChunksAPI/src/main/java/io/github/opencubicchunks/cubicchunks/api/world/IMinMaxHeight.java
@@ -32,7 +32,8 @@
 @MethodsReturnNonnullByDefault
 public interface IMinMaxHeight {
     /**
-     * Returns Y position of the bottom block in the world
+     * Returns Y position of the bottom block in the world,
+     * inclusive
      *
      * @return the bottom of the world
      */
@@ -42,6 +43,7 @@ default int getMinHeight() {
 
     /**
      * Returns Y position of block above the top block in the world,
+     * exclusive
      *
      * @return the top of the world
      */
diff --git a/src/main/java/io/github/opencubicchunks/cubicchunks/core/asm/mixin/core/common/MixinChunk_Cubes.java b/src/main/java/io/github/opencubicchunks/cubicchunks/core/asm/mixin/core/common/MixinChunk_Cubes.java
index e7ffd3d46..0ce064285 100644
--- a/src/main/java/io/github/opencubicchunks/cubicchunks/core/asm/mixin/core/common/MixinChunk_Cubes.java
+++ b/src/main/java/io/github/opencubicchunks/cubicchunks/core/asm/mixin/core/common/MixinChunk_Cubes.java
@@ -239,7 +239,9 @@ private int modifySectionArrayLength(int sixteen, World worldIn, int x, int z) {
         }
         if (!((ICubicWorld) worldIn).isCubicWorld()) {
             IMinMaxHeight y = (IMinMaxHeight) worldIn;
-            return Coords.blockToCube(y.getMaxHeight()) - Coords.blockToCube(y.getMinHeight());
+            int firstInclusiveY = y.getMinHeight();
+            int lastInclusiveY = y.getMaxHeight() - 1;
+            return Coords.blockToCube(lastInclusiveY) - Coords.blockToCube(firstInclusiveY) + 1;
         }
         return sixteen;
     }