diff --git a/mappings/net/minecraft/util/Util.mapping b/mappings/net/minecraft/util/Util.mapping
index 4da76a66fe..32051d7d35 100644
--- a/mappings/net/minecraft/util/Util.mapping
+++ b/mappings/net/minecraft/util/Util.mapping
@@ -31,6 +31,9 @@ CLASS net/minecraft/class_156 net/minecraft/util/Util
 		ARG 0 string
 		ARG 1 cursor
 		ARG 2 delta
+	METHOD method_29190 toIntArray (Ljava/util/stream/IntStream;I)Lcom/mojang/serialization/DataResult;
+		ARG 0 intStream
+		ARG 1 length
 	METHOD method_645 previous (Ljava/lang/Iterable;Ljava/lang/Object;)Ljava/lang/Object;
 	METHOD method_646 createTranslationKey (Ljava/lang/String;Lnet/minecraft/class_2960;)Ljava/lang/String;
 		ARG 0 type
diff --git a/mappings/net/minecraft/util/dynamic/DynamicSerializableUuid.mapping b/mappings/net/minecraft/util/dynamic/DynamicSerializableUuid.mapping
index 737c717aab..edd27b1db1 100644
--- a/mappings/net/minecraft/util/dynamic/DynamicSerializableUuid.mapping
+++ b/mappings/net/minecraft/util/dynamic/DynamicSerializableUuid.mapping
@@ -1 +1,8 @@
 CLASS net/minecraft/class_4844 net/minecraft/util/dynamic/DynamicSerializableUuid
+	METHOD method_26274 toIntArray (JJ)[I
+		ARG 0 uuidMost
+		ARG 2 uuidLeast
+	METHOD method_26275 toIntArray (Ljava/util/UUID;)[I
+		ARG 0 uuid
+	METHOD method_26276 toUuid ([I)Ljava/util/UUID;
+		ARG 0 array