diff --git a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java
index 75a9cdba8c..b919ac0980 100644
--- a/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java
+++ b/src/main/java/io/github/thebusybiscuit/slimefun4/implementation/listeners/BlockListener.java
@@ -266,6 +266,7 @@ private void checkForSensitiveBlocks(Block block, Integer c) {
      * @return
      *      Whether the {@link BlockData} would be supported at the given {@link Block}
      */
+    @ParametersAreNonnullByDefault
     private boolean isSupported(BlockData blockData, Block block) {
         if (Slimefun.getMinecraftVersion().isAtLeast(MinecraftVersion.MINECRAFT_1_19)) {
             return blockData.isSupported(block);