diff --git a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/node/NetworkNodeCraftingMonitor.java b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/node/NetworkNodeCraftingMonitor.java
index ea5258bd4..1df12ebd5 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/node/NetworkNodeCraftingMonitor.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/apiimpl/network/node/NetworkNodeCraftingMonitor.java
@@ -70,7 +70,7 @@ public class NetworkNodeCraftingMonitor extends NetworkNode implements ICrafting
     }
 
     @Override
-    public void onCancelled(EntityPlayerMP player, UUID id) {
+    public void onCancelled(EntityPlayerMP player, @Nullable UUID id) {
         if (network != null) {
             network.getItemGridHandler().onCraftingCancelRequested(player, id);
         }
diff --git a/src/main/java/com/raoulvdberge/refinedstorage/tile/craftingmonitor/WirelessCraftingMonitor.java b/src/main/java/com/raoulvdberge/refinedstorage/tile/craftingmonitor/WirelessCraftingMonitor.java
index 78cbc9e78..4c3ee04f5 100755
--- a/src/main/java/com/raoulvdberge/refinedstorage/tile/craftingmonitor/WirelessCraftingMonitor.java
+++ b/src/main/java/com/raoulvdberge/refinedstorage/tile/craftingmonitor/WirelessCraftingMonitor.java
@@ -47,7 +47,7 @@ public class WirelessCraftingMonitor implements ICraftingMonitor {
     }
 
     @Override
-    public void onCancelled(EntityPlayerMP player, UUID id) {
+    public void onCancelled(EntityPlayerMP player, @Nullable UUID id) {
         INetwork network = getNetwork();
 
         if (network != null) {