--- a/net/minecraft/server/commands/PlaceCommand.java
+++ b/net/minecraft/server/commands/PlaceCommand.java
@@ -131,9 +130,10 @@
         if (!structurestart.isValid()) {
             throw PlaceCommand.ERROR_STRUCTURE_FAILED.create();
         } else {
-            BoundingBox boundingbox = structurestart.getBoundingBox();
-            ChunkPos chunkpos = new ChunkPos(SectionPos.blockToSectionCoord(boundingbox.minX()), SectionPos.blockToSectionCoord(boundingbox.minZ()));
-            ChunkPos chunkpos1 = new ChunkPos(SectionPos.blockToSectionCoord(boundingbox.maxX()), SectionPos.blockToSectionCoord(boundingbox.maxZ()));
+            structurestart.generationEventCause = org.bukkit.event.world.AsyncStructureGenerateEvent.Cause.COMMAND; // CraftBukkit - set AsyncStructureGenerateEvent.Cause.COMMAND as generation cause
+            BoundingBox structureboundingbox = structurestart.getBoundingBox();
+            ChunkPos chunkcoordintpair = new ChunkPos(SectionPos.blockToSectionCoord(structureboundingbox.minX()), SectionPos.blockToSectionCoord(structureboundingbox.minZ()));
+            ChunkPos chunkcoordintpair1 = new ChunkPos(SectionPos.blockToSectionCoord(structureboundingbox.maxX()), SectionPos.blockToSectionCoord(structureboundingbox.maxZ()));
 
             checkLoaded(serverlevel, chunkpos, chunkpos1);
             ChunkPos.rangeClosed(chunkpos, chunkpos1).forEach((chunkpos2) -> {