diff --git a/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_8/BukkitQueue_1_8.java b/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_8/BukkitQueue_1_8.java
index a6c4cd02..56a238cb 100644
--- a/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_8/BukkitQueue_1_8.java
+++ b/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_8/BukkitQueue_1_8.java
@@ -257,6 +257,9 @@ public class BukkitQueue_1_8 extends BukkitQueue_0 {
 
     @Override
     public int getCombinedId4Data(int x, int y, int z) {
+        if (y < 0 || y > 255) {
+            return 0;
+        }
         int cx = x >> 4;
         int cz = z >> 4;
         int cy = y >> 4;
diff --git a/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_9/BukkitQueue_1_9.java b/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_9/BukkitQueue_1_9.java
index bb511c4b..d8c1e962 100644
--- a/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_9/BukkitQueue_1_9.java
+++ b/bukkit/src/main/java/com/boydti/fawe/bukkit/v1_9/BukkitQueue_1_9.java
@@ -232,6 +232,9 @@ public class BukkitQueue_1_9 extends BukkitQueue_0 {
 
     @Override
     public int getCombinedId4Data(int x, int y, int z) {
+        if (y < 0 || y > 255) {
+            return 0;
+        }
         try {
             int cx = x >> 4;
             int cz = z >> 4;
diff --git a/forge/src/main/java/com/boydti/fawe/forge/v1_8/SpongeQueue_1_8.java b/forge/src/main/java/com/boydti/fawe/forge/v1_8/SpongeQueue_1_8.java
index 577baa28..11217b53 100644
--- a/forge/src/main/java/com/boydti/fawe/forge/v1_8/SpongeQueue_1_8.java
+++ b/forge/src/main/java/com/boydti/fawe/forge/v1_8/SpongeQueue_1_8.java
@@ -88,6 +88,9 @@ public class SpongeQueue_1_8 extends SpongeQueue_0 {
 
     @Override
     public int getCombinedId4Data(int x, int y, int z) {
+        if (y < 0 || y > 255) {
+            return 0;
+        }
         int cx = x >> 4;
         int cz = z >> 4;
         int cy = y >> 4;