diff --git a/patches/server/0017-Fix-pistons-not-working-in-nether-roof.patch b/patches/server/0017-Fix-pistons-not-working-in-nether-roof.patch
new file mode 100644
index 000000000..61a190968
--- /dev/null
+++ b/patches/server/0017-Fix-pistons-not-working-in-nether-roof.patch
@@ -0,0 +1,53 @@
+From a8f2de4f00321e36cd8faf16c2f392ef7ed6ddd7 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <blake.galbreath@gmail.com>
+Date: Sun, 12 May 2019 06:15:25 -0500
+Subject: [PATCH] Fix pistons not working in nether roof
+
+---
+ src/main/java/net/minecraft/server/BlockPiston.java  | 2 +-
+ src/main/java/net/minecraft/server/IBlockAccess.java | 2 +-
+ src/main/java/net/minecraft/server/World.java        | 2 +-
+ 3 files changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/src/main/java/net/minecraft/server/BlockPiston.java b/src/main/java/net/minecraft/server/BlockPiston.java
+index a5573f21f..61bfa1e78 100644
+--- a/src/main/java/net/minecraft/server/BlockPiston.java
++++ b/src/main/java/net/minecraft/server/BlockPiston.java
+@@ -248,7 +248,7 @@ public class BlockPiston extends BlockDirectional {
+         } else if (!world.getWorldBorder().a(blockposition)) {
+             return false;
+         } else if (blockposition.getY() >= 0 && (enumdirection != EnumDirection.DOWN || blockposition.getY() != 0)) {
+-            if (blockposition.getY() <= world.getHeight() - 1 && (enumdirection != EnumDirection.UP || blockposition.getY() != world.getHeight() - 1)) {
++            if (blockposition.getY() <= world.getDefHeight() - 1 && (enumdirection != EnumDirection.UP || blockposition.getY() != world.getDefHeight() - 1)) { // Purpur - use bgr.I() not bhh.W()
+                 if (block != Blocks.PISTON && block != Blocks.STICKY_PISTON) {
+                     if (iblockdata.f(world, blockposition) == -1.0F) {
+                         return false;
+diff --git a/src/main/java/net/minecraft/server/IBlockAccess.java b/src/main/java/net/minecraft/server/IBlockAccess.java
+index c44edda65..1f0fd6869 100644
+--- a/src/main/java/net/minecraft/server/IBlockAccess.java
++++ b/src/main/java/net/minecraft/server/IBlockAccess.java
+@@ -21,7 +21,7 @@ public interface IBlockAccess {
+         return 15;
+     }
+ 
+-    default int getHeight() {
++    default int getDefHeight() { // Purpur - this is bgr.I()
+         return 256;
+     }
+ 
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index a9a358955..d9cbfbe4a 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -1450,7 +1450,7 @@ public abstract class World implements IIBlockAccess, GeneratorAccess, AutoClose
+ 
+     public void b(int i, BlockPosition blockposition, int j) {}
+ 
+-    @Override
++    //@Override // Purpur -  this is bhh.W() not bgr.I() there is a HUGE difference!
+     public int getHeight() {
+         return this.worldProvider.h() ? 128 : 256;
+     }
+-- 
+2.20.1
+