1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/java/net/minecraft/server/BlockPistonExtension.java b/src/main/java/net/minecraft/server/BlockPistonExtension.java
index c432640b..cb7455da 100644
--- a/src/main/java/net/minecraft/server/BlockPistonExtension.java
+++ b/src/main/java/net/minecraft/server/BlockPistonExtension.java
@@ -164,6 +164,6 @@ public class BlockPistonExtension extends Block {
     }
 
     public static int b(int i) {
-        return i & 7;
+        return MathHelper.a(i & 7, 0, Facing.b.length - 1);
     }
 }