diff --git a/src/main/java/com/sk89q/worldedit/blocks/BlockData.java b/src/main/java/com/sk89q/worldedit/blocks/BlockData.java
index 3019146e6..56cdbaef1 100644
--- a/src/main/java/com/sk89q/worldedit/blocks/BlockData.java
+++ b/src/main/java/com/sk89q/worldedit/blocks/BlockData.java
@@ -628,6 +628,9 @@ public final class BlockData {
         case BlockID.BRICK_STAIRS:
         case BlockID.STONE_BRICK_STAIRS:
         case BlockID.NETHER_BRICK_STAIRS:
+            if (data > 7) return -1;
+            return mod((data + increment), 8);
+
         case BlockID.PUMPKIN:
         case BlockID.JACKOLANTERN:
         case BlockID.NETHER_WART: