diff --git a/src/main/java/com/simibubi/create/AllItems.java b/src/main/java/com/simibubi/create/AllItems.java
index c0d9bf80e..4a22a4062 100644
--- a/src/main/java/com/simibubi/create/AllItems.java
+++ b/src/main/java/com/simibubi/create/AllItems.java
@@ -116,7 +116,7 @@ public class AllItems {
 			.register();
 
 	public static final ItemEntry<VerticalGearboxItem> VERTICAL_GEARBOX = REGISTRATE.item("vertical_gearbox", VerticalGearboxItem::new)
-		.model(AssetLookup.customItemModel("gearbox", "item_vertical"))
+		.model(AssetLookup.<VerticalGearboxItem>customItemModel("gearbox", "item_vertical"))
 		.register();
 
 	public static final ItemEntry<SuperGlueItem> SUPER_GLUE = REGISTRATE.item("super_glue", SuperGlueItem::new)
diff --git a/src/main/java/com/simibubi/create/foundation/data/AssetLookup.java b/src/main/java/com/simibubi/create/foundation/data/AssetLookup.java
index 33a940420..80a0b8c6f 100644
--- a/src/main/java/com/simibubi/create/foundation/data/AssetLookup.java
+++ b/src/main/java/com/simibubi/create/foundation/data/AssetLookup.java
@@ -46,7 +46,7 @@ public class AssetLookup {
 	 * Generate item model inheriting from a seperate model in
 	 * models/block/x/item.json
 	 */
-	public static ItemModelBuilder customItemModel(DataGenContext<Item, ? extends BlockItem> ctx,
+	public static <I extends BlockItem> ItemModelBuilder customItemModel(DataGenContext<Item, I> ctx,
 		RegistrateItemModelProvider prov) {
 		return prov.blockItem(() -> ctx.getEntry()
 			.getBlock(), "/item");
diff --git a/src/main/java/com/simibubi/create/foundation/data/CreateRegistrate.java b/src/main/java/com/simibubi/create/foundation/data/CreateRegistrate.java
index c318b77cc..eea64aad1 100644
--- a/src/main/java/com/simibubi/create/foundation/data/CreateRegistrate.java
+++ b/src/main/java/com/simibubi/create/foundation/data/CreateRegistrate.java
@@ -135,8 +135,9 @@ public class CreateRegistrate extends AbstractRegistrate<CreateRegistrate> {
 
 	public static <T extends Item, P> NonNullUnaryOperator<ItemBuilder<T, P>> customRenderedItem(
 		Supplier<NonNullFunction<IBakedModel, ? extends CustomRenderedItemModel>> func) {
-		return b -> b.properties(p -> p.setISTER(() -> func.get()
-			.apply(null)::createRenderer))
+		return b -> b.properties(p -> p.setISTER(() -> () -> func.get()
+			.apply(null)
+			.createRenderer()))
 			.onRegister(entry -> onClient(() -> () -> registerCustomRenderedItem(entry, func)));
 	}