diff --git a/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MDeferredRegister.kt b/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MDeferredRegister.kt
index 3cc38196e..5eaa476b9 100644
--- a/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MDeferredRegister.kt
+++ b/src/main/kotlin/ru/dbotthepony/mc/otm/registry/MDeferredRegister.kt
@@ -22,7 +22,7 @@ import kotlin.reflect.KProperty
 /**
  * DeferredRegister which allows parallel initialization
  */
-class MDeferredRegister<R : Any>(val registry: ResourceKey<Registry<R>>, val modId: String = OverdriveThatMatters.MOD_ID) {
+class MDeferredRegister<R : Any>(val registry: ResourceKey<out Registry<R>>, val modId: String = OverdriveThatMatters.MOD_ID) {
 	constructor(registry: IForgeRegistry<R>, modId: String = OverdriveThatMatters.MOD_ID) : this(registry.registryKey, modId)
 
 	private val entries = Object2ObjectLinkedOpenHashMap<String, Entry<R>>()