diff --git a/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/api/transfer/v1/storage/base/SidedStorageBlockEntity.java b/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/api/transfer/v1/storage/base/SidedStorageBlockEntity.java
index 09c20208fa..b7f466271b 100644
--- a/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/api/transfer/v1/storage/base/SidedStorageBlockEntity.java
+++ b/fabric-transfer-api-v1/src/main/java/net/fabricmc/fabric/api/transfer/v1/storage/base/SidedStorageBlockEntity.java
@@ -47,19 +47,23 @@
 public interface SidedStorageBlockEntity {
 	/**
 	 * Return a fluid storage if available on the queried side, or null otherwise.
+	 *
+	 * @param side The side of the storage to query, {@code null} means that the full storage without the restriction should be returned instead.
 	 */
 	@ApiStatus.OverrideOnly
 	@Nullable
-	default Storage<FluidVariant> getFluidStorage(Direction side) {
+	default Storage<FluidVariant> getFluidStorage(@Nullable Direction side) {
 		return null;
 	}
 
 	/**
 	 * Return an item storage if available on the queried side, or null otherwise.
+	 *
+	 * @param side The side of the storage to query, {@code null} means that the full storage without the restriction should be returned instead.
 	 */
 	@ApiStatus.OverrideOnly
 	@Nullable
-	default Storage<ItemVariant> getItemStorage(Direction side) {
+	default Storage<ItemVariant> getItemStorage(@Nullable Direction side) {
 		return null;
 	}
 }