diff --git a/build-data/paper.at b/build-data/paper.at
index 5394004025..3bd1667cc3 100644
--- a/build-data/paper.at
+++ b/build-data/paper.at
@@ -281,6 +281,7 @@ public net.minecraft.world.level.levelgen.SurfaceRules$Context blockZ
 public net.minecraft.world.level.levelgen.SurfaceRules$Context context
 public net.minecraft.world.level.levelgen.SurfaceRules$Context system
 public net.minecraft.world.level.levelgen.SurfaceRules$LazyYCondition
+public net.minecraft.world.level.levelgen.SurfaceRules$LazyCondition
 public net.minecraft.world.level.levelgen.SurfaceRules$VerticalGradientConditionSource
 public net.minecraft.world.level.levelgen.SurfaceRules$SurfaceRule
 public net.minecraft.world.level.levelgen.SurfaceSystem getOrCreateRandomFactory(Lnet/minecraft/resources/ResourceLocation;)Lnet/minecraft/world/level/levelgen/PositionalRandomFactory;