diff --git a/src/net/minecraft/world/generators/WorldGenBigTree.java b/src/net/minecraft/world/generators/WorldGenBigTree.java
index 5e0c01a..c1fd20a 100644
--- a/src/net/minecraft/world/generators/WorldGenBigTree.java
+++ b/src/net/minecraft/world/generators/WorldGenBigTree.java
@@ -289,7 +289,10 @@ public class WorldGenBigTree extends WorldGenerator {
                 var13[var6] = MathHelper.floor_double((double) var1[var6] + (double) var14 * var9);
                 var13[var7] = MathHelper.floor_double((double) var1[var7] + (double) var14 * var11);
                 int var16 = this.worldObj.getBlockId(var13[0], var13[1], var13[2]);
-                if (var16 != 0 && var16 != 18) {
+                // Patch start
+                // if (var16 != 0 && var16 != 18) {
+                if ((var16 != 0 && var16 != 18) || var13[1] >= 128) {
+                // Patch end
                     break;
                 }
             }